(function (exports) {
  'use strict';

  /*!
   * Vue.js v2.6.12
   * (c) 2014-2020 Evan You
   * Released under the MIT License.
   */

  /**
   * Modify list for integration with Bitrix Framework:
   * - change default export to local for work in Bitrix CoreJS extensions;
   */


  if (typeof exports !== 'undefined' && typeof exports.VueVendorV2 !== 'undefined') {
    var currentVersion = '2.6.12';

    if (exports.VueVendorV2.version != currentVersion) {
      console.warn('BX.Vue already loaded. Loaded: ' + exports.VueVendorV2.version + ', Skipped: ' + currentVersion);
    }

    exports.VueVendorV2 = exports.VueVendorV2;
  } else {
    var emptyObject = Object.freeze({}); // These helpers produce better VM code in JS engines due to their
    // explicitness and function inlining.

    function isUndef(v) {
      return v === undefined || v === null;
    }

    function isDef(v) {
      return v !== undefined && v !== null;
    }

    function isTrue(v) {
      return v === true;
    }

    function isFalse(v) {
      return v === false;
    }
    /**
     * Check if value is primitive.
     */


    function isPrimitive(value) {
      return typeof value === 'string' || typeof value === 'number' || // $flow-disable-line
      babelHelpers.typeof(value) === 'symbol' || typeof value === 'boolean';
    }
    /**
     * Quick object check - this is primarily used to tell
     * Objects from primitive values when we know the value
     * is a JSON-compliant type.
     */


    function isObject(obj) {
      return obj !== null && babelHelpers.typeof(obj) === 'object';
    }
    /**
     * Get the raw type string of a value, e.g., [object Object].
     */


    var _toString = Object.prototype.toString;

    function toRawType(value) {
      return _toString.call(value).slice(8, -1);
    }
    /**
     * Strict object type check. Only returns true
     * for plain JavaScript objects.
     */


    function isPlainObject(obj) {
      return _toString.call(obj) === '[object Object]';
    }

    function isRegExp(v) {
      return _toString.call(v) === '[object RegExp]';
    }
    /**
     * Check if val is a valid array index.
     */


    function isValidArrayIndex(val) {
      var n = parseFloat(String(val));
      return n >= 0 && Math.floor(n) === n && isFinite(val);
    }

    function isPromise(val) {
      return isDef(val) && typeof val.then === 'function' && typeof val.catch === 'function';
    }
    /**
     * Convert a value to a string that is actually rendered.
     */


    function _toString2(val) {
      return val == null ? '' : Array.isArray(val) || isPlainObject(val) && val.toString === _toString ? JSON.stringify(val, null, 2) : String(val);
    }
    /**
     * Convert an input value to a number for persistence.
     * If the conversion fails, return original string.
     */


    function toNumber(val) {
      var n = parseFloat(val);
      return isNaN(n) ? val : n;
    }
    /**
     * Make a map and return a function for checking if a key
     * is in that map.
     */


    function makeMap(str, expectsLowerCase) {
      var map = Object.create(null);
      var list = str.split(',');

      for (var i = 0; i < list.length; i++) {
        map[list[i]] = true;
      }

      return expectsLowerCase ? function (val) {
        return map[val.toLowerCase()];
      } : function (val) {
        return map[val];
      };
    }
    /**
     * Check if a tag is a built-in tag.
     */


    var isBuiltInTag = makeMap('slot,component', true);
    /**
     * Check if an attribute is a reserved attribute.
     */

    var isReservedAttribute = makeMap('key,ref,slot,slot-scope,is');
    /**
     * Remove an item from an array.
     */

    function remove(arr, item) {
      if (arr.length) {
        var index = arr.indexOf(item);

        if (index > -1) {
          return arr.splice(index, 1);
        }
      }
    }
    /**
     * Check whether an object has the property.
     */


    var hasOwnProperty = Object.prototype.hasOwnProperty;

    function hasOwn(obj, key) {
      return hasOwnProperty.call(obj, key);
    }
    /**
     * Create a cached version of a pure function.
     */


    function cached(fn) {
      var cache = Object.create(null);
      return function cachedFn(str) {
        var hit = cache[str];
        return hit || (cache[str] = fn(str));
      };
    }
    /**
     * Camelize a hyphen-delimited string.
     */


    var camelizeRE = /-(\w)/g;
    var camelize = cached(function (str) {
      return str.replace(camelizeRE, function (_, c) {
        return c ? c.toUpperCase() : '';
      });
    });
    /**
     * Capitalize a string.
     */

    var capitalize = cached(function (str) {
      return str.charAt(0).toUpperCase() + str.slice(1);
    });
    /**
     * Hyphenate a camelCase string.
     */

    var hyphenateRE = /\B([A-Z])/g;
    var hyphenate = cached(function (str) {
      return str.replace(hyphenateRE, '-$1').toLowerCase();
    });
    /**
     * Simple bind polyfill for environments that do not support it,
     * e.g., PhantomJS 1.x. Technically, we don't need this anymore
     * since native bind is now performant enough in most browsers.
     * But removing it would mean breaking code that was able to run in
     * PhantomJS 1.x, so this must be kept for backward compatibility.
     */

    /* istanbul ignore next */

    function polyfillBind(fn, ctx) {
      function boundFn(a) {
        var l = arguments.length;
        return l ? l > 1 ? fn.apply(ctx, arguments) : fn.call(ctx, a) : fn.call(ctx);
      }

      boundFn._length = fn.length;
      return boundFn;
    }

    function nativeBind(fn, ctx) {
      return fn.bind(ctx);
    }

    var bind = Function.prototype.bind ? nativeBind : polyfillBind;
    /**
     * Convert an Array-like object to a real Array.
     */

    function toArray(list, start) {
      start = start || 0;
      var i = list.length - start;
      var ret = new Array(i);

      while (i--) {
        ret[i] = list[i + start];
      }

      return ret;
    }
    /**
     * Mix properties into target object.
     */


    function extend(to, _from) {
      for (var key in _from) {
        to[key] = _from[key];
      }

      return to;
    }
    /**
     * Merge an Array of Objects into a single Object.
     */


    function toObject(arr) {
      var res = {};

      for (var i = 0; i < arr.length; i++) {
        if (arr[i]) {
          extend(res, arr[i]);
        }
      }

      return res;
    }
    /* eslint-disable no-unused-vars */

    /**
     * Perform no operation.
     * Stubbing args to make Flow happy without leaving useless transpiled code
     * with ...rest (https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/).
     */


    function noop(a, b, c) {}
    /**
     * Always return false.
     */


    var no = function no(a, b, c) {
      return false;
    };
    /* eslint-enable no-unused-vars */

    /**
     * Return the same value.
     */


    var identity = function identity(_) {
      return _;
    };
    /**
     * Generate a string containing static keys from compiler modules.
     */


    function genStaticKeys(modules) {
      return modules.reduce(function (keys, m) {
        return keys.concat(m.staticKeys || []);
      }, []).join(',');
    }
    /**
     * Check if two values are loosely equal - that is,
     * if they are plain objects, do they have the same shape?
     */


    function looseEqual(a, b) {
      if (a === b) {
        return true;
      }

      var isObjectA = isObject(a);
      var isObjectB = isObject(b);

      if (isObjectA && isObjectB) {
        try {
          var isArrayA = Array.isArray(a);
          var isArrayB = Array.isArray(b);

          if (isArrayA && isArrayB) {
            return a.length === b.length && a.every(function (e, i) {
              return looseEqual(e, b[i]);
            });
          } else if (a instanceof Date && b instanceof Date) {
            return a.getTime() === b.getTime();
          } else if (!isArrayA && !isArrayB) {
            var keysA = Object.keys(a);
            var keysB = Object.keys(b);
            return keysA.length === keysB.length && keysA.every(function (key) {
              return looseEqual(a[key], b[key]);
            });
          } else {
            /* istanbul ignore next */
            return false;
          }
        } catch (e) {
          /* istanbul ignore next */
          return false;
        }
      } else if (!isObjectA && !isObjectB) {
        return String(a) === String(b);
      } else {
        return false;
      }
    }
    /**
     * Return the first index at which a loosely equal value can be
     * found in the array (if value is a plain object, the array must
     * contain an object of the same shape), or -1 if it is not present.
     */


    function looseIndexOf(arr, val) {
      for (var i = 0; i < arr.length; i++) {
        if (looseEqual(arr[i], val)) {
          return i;
        }
      }

      return -1;
    }
    /**
     * Ensure a function is called only once.
     */


    function once(fn) {
      var called = false;
      return function () {
        if (!called) {
          called = true;
          fn.apply(this, arguments);
        }
      };
    }

    var SSR_ATTR = 'data-server-rendered';
    var ASSET_TYPES = ['component', 'directive', 'filter'];
    var LIFECYCLE_HOOKS = ['beforeCreate', 'created', 'beforeMount', 'mounted', 'beforeUpdate', 'updated', 'beforeDestroy', 'destroyed', 'activated', 'deactivated', 'errorCaptured', 'serverPrefetch'];
    /*  */

    var config = {
      /**
       * Option merge strategies (used in core/util/options)
       */
      // $flow-disable-line
      optionMergeStrategies: Object.create(null),

      /**
       * Whether to suppress warnings.
       */
      silent: false,

      /**
       * Show production mode tip message on boot?
       */
      productionTip: "development" !== 'production',

      /**
       * Whether to enable devtools
       */
      devtools: "development" !== 'production',

      /**
       * Whether to record perf
       */
      performance: false,

      /**
       * Error handler for watcher errors
       */
      errorHandler: null,

      /**
       * Warn handler for watcher warns
       */
      warnHandler: null,

      /**
       * Ignore certain custom elements
       */
      ignoredElements: [],

      /**
       * Custom user key aliases for v-on
       */
      // $flow-disable-line
      keyCodes: Object.create(null),

      /**
       * Check if a tag is reserved so that it cannot be registered as a
       * component. This is platform-dependent and may be overwritten.
       */
      isReservedTag: no,

      /**
       * Check if an attribute is reserved so that it cannot be used as a component
       * prop. This is platform-dependent and may be overwritten.
       */
      isReservedAttr: no,

      /**
       * Check if a tag is an unknown element.
       * Platform-dependent.
       */
      isUnknownElement: no,

      /**
       * Get the namespace of an element
       */
      getTagNamespace: noop,

      /**
       * Parse the real tag name for the specific platform.
       */
      parsePlatformTagName: identity,

      /**
       * Check if an attribute must be bound using property, e.g. value
       * Platform-dependent.
       */
      mustUseProp: no,

      /**
       * Perform updates asynchronously. Intended to be used by Vue Test Utils
       * This will significantly reduce performance if set to false.
       */
      async: true,

      /**
       * Exposed for legacy reasons
       */
      _lifecycleHooks: LIFECYCLE_HOOKS
    };
    /*  */

    /**
     * unicode letters used for parsing html tags, component names and property paths.
     * using https://www.w3.org/TR/html53/semantics-scripting.html#potentialcustomelementname
     * skipping \u10000-\uEFFFF due to it freezing up PhantomJS
     */

    var unicodeRegExp = /a-zA-Z\u00B7\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u037D\u037F-\u1FFF\u200C-\u200D\u203F-\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD/;
    /**
     * Check if a string starts with $ or _
     */

    function isReserved(str) {
      var c = (str + '').charCodeAt(0);
      return c === 0x24 || c === 0x5F;
    }
    /**
     * Define a property.
     */


    function def(obj, key, val, enumerable) {
      Object.defineProperty(obj, key, {
        value: val,
        enumerable: !!enumerable,
        writable: true,
        configurable: true
      });
    }
    /**
     * Parse simple path.
     */


    var bailRE = new RegExp("[^" + unicodeRegExp.source + ".$_\\d]");

    function parsePath(path) {
      if (bailRE.test(path)) {
        return;
      }

      var segments = path.split('.');
      return function (obj) {
        for (var i = 0; i < segments.length; i++) {
          if (!obj) {
            return;
          }

          obj = obj[segments[i]];
        }

        return obj;
      };
    }
    /*  */
    // can we use __proto__?


    var hasProto = ('__proto__' in {}); // Browser environment sniffing

    var inBrowser = typeof window !== 'undefined';
    var inWeex = typeof WXEnvironment !== 'undefined' && !!WXEnvironment.platform;
    var weexPlatform = inWeex && WXEnvironment.platform.toLowerCase();
    var UA = inBrowser && window.navigator.userAgent.toLowerCase();
    var isIE = UA && /msie|trident/.test(UA);
    var isIE9 = UA && UA.indexOf('msie 9.0') > 0;
    var isEdge = UA && UA.indexOf('edge/') > 0;
    var isAndroid = UA && UA.indexOf('android') > 0 || weexPlatform === 'android';
    var isIOS = UA && /iphone|ipad|ipod|ios/.test(UA) || weexPlatform === 'ios';
    var isChrome = UA && /chrome\/\d+/.test(UA) && !isEdge;
    var isPhantomJS = UA && /phantomjs/.test(UA);
    var isFF = UA && UA.match(/firefox\/(\d+)/); // Firefox has a "watch" function on Object.prototype...

    var nativeWatch = {}.watch;
    var supportsPassive = false;

    if (inBrowser) {
      try {
        var opts = {};
        Object.defineProperty(opts, 'passive', {
          get: function get() {
            /* istanbul ignore next */
            supportsPassive = true;
          }
        }); // https://github.com/facebook/flow/issues/285

        window.addEventListener('test-passive', null, opts);
      } catch (e) {}
    } // this needs to be lazy-evaled because vue may be required before
    // vue-server-renderer can set VUE_ENV


    var _isServer;

    var isServerRendering = function isServerRendering() {
      if (_isServer === undefined) {
        /* istanbul ignore if */
        if (!inBrowser && !inWeex && typeof global !== 'undefined') {
          // detect presence of vue-server-renderer and avoid
          // Webpack shimming the process
          _isServer = global['process'] && global['process'].env.VUE_ENV === 'server';
        } else {
          _isServer = false;
        }
      }

      return _isServer;
    }; // detect devtools


    var devtools = inBrowser && window.__VUE_DEVTOOLS_GLOBAL_HOOK__;
    /* istanbul ignore next */

    function isNative(Ctor) {
      return typeof Ctor === 'function' && /native code/.test(Ctor.toString());
    }

    var hasSymbol = typeof Symbol !== 'undefined' && isNative(Symbol) && typeof Reflect !== 'undefined' && isNative(Reflect.ownKeys);

    var _Set;
    /* istanbul ignore if */
    // $flow-disable-line


    if (typeof Set !== 'undefined' && isNative(Set)) {
      // use native Set when available.
      _Set = Set;
    } else {
      // a non-standard Set polyfill that only works with primitive keys.
      _Set = /*@__PURE__*/function () {
        function Set() {
          this.set = Object.create(null);
        }

        Set.prototype.has = function has(key) {
          return this.set[key] === true;
        };

        Set.prototype.add = function add(key) {
          this.set[key] = true;
        };

        Set.prototype.clear = function clear() {
          this.set = Object.create(null);
        };

        return Set;
      }();
    }
    /*  */


    var warn = noop;
    var tip = noop;
    var generateComponentTrace = noop; // work around flow check

    var formatComponentName = noop;
    {
      var hasConsole = typeof console !== 'undefined';
      var classifyRE = /(?:^|[-_])(\w)/g;

      var classify = function classify(str) {
        return str.replace(classifyRE, function (c) {
          return c.toUpperCase();
        }).replace(/[-_]/g, '');
      };

      warn = function warn(msg, vm) {
        var trace = vm ? generateComponentTrace(vm) : '';

        if (config.warnHandler) {
          config.warnHandler.call(null, msg, vm, trace);
        } else if (hasConsole && !config.silent) {
          console.error("[Vue warn]: " + msg + trace);
        }
      };

      tip = function tip(msg, vm) {
        if (hasConsole && !config.silent) {
          console.warn("[Vue tip]: " + msg + (vm ? generateComponentTrace(vm) : ''));
        }
      };

      formatComponentName = function formatComponentName(vm, includeFile) {
        if (vm.$root === vm) {
          return '<Root>';
        }

        var options = typeof vm === 'function' && vm.cid != null ? vm.options : vm._isVue ? vm.$options || vm.constructor.options : vm;
        var name = options.name || options._componentTag;
        var file = options.__file;

        if (!name && file) {
          var match = file.match(/([^/\\]+)\.vue$/);
          name = match && match[1];
        }

        return (name ? "<" + classify(name) + ">" : "<Anonymous>") + (file && includeFile !== false ? " at " + file : '');
      };

      var repeat = function repeat(str, n) {
        var res = '';

        while (n) {
          if (n % 2 === 1) {
            res += str;
          }

          if (n > 1) {
            str += str;
          }

          n >>= 1;
        }

        return res;
      };

      generateComponentTrace = function generateComponentTrace(vm) {
        if (vm._isVue && vm.$parent) {
          var tree = [];
          var currentRecursiveSequence = 0;

          while (vm) {
            if (tree.length > 0) {
              var last = tree[tree.length - 1];

              if (last.constructor === vm.constructor) {
                currentRecursiveSequence++;
                vm = vm.$parent;
                continue;
              } else if (currentRecursiveSequence > 0) {
                tree[tree.length - 1] = [last, currentRecursiveSequence];
                currentRecursiveSequence = 0;
              }
            }

            tree.push(vm);
            vm = vm.$parent;
          }

          return '\n\nfound in\n\n' + tree.map(function (vm, i) {
            return "" + (i === 0 ? '---> ' : repeat(' ', 5 + i * 2)) + (Array.isArray(vm) ? formatComponentName(vm[0]) + "... (" + vm[1] + " recursive calls)" : formatComponentName(vm));
          }).join('\n');
        } else {
          return "\n\n(found in " + formatComponentName(vm) + ")";
        }
      };
    }
    /*  */

    var uid = 0;
    /**
     * A dep is an observable that can have multiple
     * directives subscribing to it.
     */

    var Dep = function Dep() {
      this.id = uid++;
      this.subs = [];
    };

    Dep.prototype.addSub = function addSub(sub) {
      this.subs.push(sub);
    };

    Dep.prototype.removeSub = function removeSub(sub) {
      remove(this.subs, sub);
    };

    Dep.prototype.depend = function depend() {
      if (Dep.target) {
        Dep.target.addDep(this);
      }
    };

    Dep.prototype.notify = function notify() {
      // stabilize the subscriber list first
      var subs = this.subs.slice();

      if (!config.async) {
        // subs aren't sorted in scheduler if not running async
        // we need to sort them now to make sure they fire in correct
        // order
        subs.sort(function (a, b) {
          return a.id - b.id;
        });
      }

      for (var i = 0, l = subs.length; i < l; i++) {
        subs[i].update();
      }
    }; // The current target watcher being evaluated.
    // This is globally unique because only one watcher
    // can be evaluated at a time.


    Dep.target = null;
    var targetStack = [];

    function pushTarget(target) {
      targetStack.push(target);
      Dep.target = target;
    }

    function popTarget() {
      targetStack.pop();
      Dep.target = targetStack[targetStack.length - 1];
    }
    /*  */


    var VNode = function VNode(tag, data, children, text, elm, context, componentOptions, asyncFactory) {
      this.tag = tag;
      this.data = data;
      this.children = children;
      this.text = text;
      this.elm = elm;
      this.ns = undefined;
      this.context = context;
      this.fnContext = undefined;
      this.fnOptions = undefined;
      this.fnScopeId = undefined;
      this.key = data && data.key;
      this.componentOptions = componentOptions;
      this.componentInstance = undefined;
      this.parent = undefined;
      this.raw = false;
      this.isStatic = false;
      this.isRootInsert = true;
      this.isComment = false;
      this.isCloned = false;
      this.isOnce = false;
      this.asyncFactory = asyncFactory;
      this.asyncMeta = undefined;
      this.isAsyncPlaceholder = false;
    };

    var prototypeAccessors = {
      child: {
        configurable: true
      }
    }; // DEPRECATED: alias for componentInstance for backwards compat.

    /* istanbul ignore next */

    prototypeAccessors.child.get = function () {
      return this.componentInstance;
    };

    Object.defineProperties(VNode.prototype, prototypeAccessors);

    var createEmptyVNode = function createEmptyVNode(text) {
      if (text === void 0) text = '';
      var node = new VNode();
      node.text = text;
      node.isComment = true;
      return node;
    };

    function createTextVNode(val) {
      return new VNode(undefined, undefined, undefined, String(val));
    } // optimized shallow clone
    // used for static nodes and slot nodes because they may be reused across
    // multiple renders, cloning them avoids errors when DOM manipulations rely
    // on their elm reference.


    function cloneVNode(vnode) {
      var cloned = new VNode(vnode.tag, vnode.data, // #7975
      // clone children array to avoid mutating original in case of cloning
      // a child.
      vnode.children && vnode.children.slice(), vnode.text, vnode.elm, vnode.context, vnode.componentOptions, vnode.asyncFactory);
      cloned.ns = vnode.ns;
      cloned.isStatic = vnode.isStatic;
      cloned.key = vnode.key;
      cloned.isComment = vnode.isComment;
      cloned.fnContext = vnode.fnContext;
      cloned.fnOptions = vnode.fnOptions;
      cloned.fnScopeId = vnode.fnScopeId;
      cloned.asyncMeta = vnode.asyncMeta;
      cloned.isCloned = true;
      return cloned;
    }
    /*
     * not type checking this file because flow doesn't play well with
     * dynamically accessing methods on Array prototype
     */


    var arrayProto = Array.prototype;
    var arrayMethods = Object.create(arrayProto);
    var methodsToPatch = ['push', 'pop', 'shift', 'unshift', 'splice', 'sort', 'reverse'];
    /**
     * Intercept mutating methods and emit events
     */

    methodsToPatch.forEach(function (method) {
      // cache original method
      var original = arrayProto[method];
      def(arrayMethods, method, function mutator() {
        var args = [],
            len = arguments.length;

        while (len--) {
          args[len] = arguments[len];
        }

        var result = original.apply(this, args);
        var ob = this.__ob__;
        var inserted;

        switch (method) {
          case 'push':
          case 'unshift':
            inserted = args;
            break;

          case 'splice':
            inserted = args.slice(2);
            break;
        }

        if (inserted) {
          ob.observeArray(inserted);
        } // notify change


        ob.dep.notify();
        return result;
      });
    });
    /*  */

    var arrayKeys = Object.getOwnPropertyNames(arrayMethods);
    /**
     * In some cases we may want to disable observation inside a component's
     * update computation.
     */

    var shouldObserve = true;

    function toggleObserving(value) {
      shouldObserve = value;
    }
    /**
     * Observer class that is attached to each observed
     * object. Once attached, the observer converts the target
     * object's property keys into getter/setters that
     * collect dependencies and dispatch updates.
     */


    var Observer = function Observer(value) {
      this.value = value;
      this.dep = new Dep();
      this.vmCount = 0;
      def(value, '__ob__', this);

      if (Array.isArray(value)) {
        if (hasProto) {
          protoAugment(value, arrayMethods);
        } else {
          copyAugment(value, arrayMethods, arrayKeys);
        }

        this.observeArray(value);
      } else {
        this.walk(value);
      }
    };
    /**
     * Walk through all properties and convert them into
     * getter/setters. This method should only be called when
     * value type is Object.
     */


    Observer.prototype.walk = function walk(obj) {
      var keys = Object.keys(obj);

      for (var i = 0; i < keys.length; i++) {
        defineReactive$$1(obj, keys[i]);
      }
    };
    /**
     * Observe a list of Array items.
     */


    Observer.prototype.observeArray = function observeArray(items) {
      for (var i = 0, l = items.length; i < l; i++) {
        observe(items[i]);
      }
    }; // helpers

    /**
     * Augment a target Object or Array by intercepting
     * the prototype chain using __proto__
     */


    function protoAugment(target, src) {
      /* eslint-disable no-proto */
      target.__proto__ = src;
      /* eslint-enable no-proto */
    }
    /**
     * Augment a target Object or Array by defining
     * hidden properties.
     */

    /* istanbul ignore next */


    function copyAugment(target, src, keys) {
      for (var i = 0, l = keys.length; i < l; i++) {
        var key = keys[i];
        def(target, key, src[key]);
      }
    }
    /**
     * Attempt to create an observer instance for a value,
     * returns the new observer if successfully observed,
     * or the existing observer if the value already has one.
     */


    function observe(value, asRootData) {
      if (!isObject(value) || value instanceof VNode) {
        return;
      }

      var ob;

      if (hasOwn(value, '__ob__') && value.__ob__ instanceof Observer) {
        ob = value.__ob__;
      } else if (shouldObserve && !isServerRendering() && (Array.isArray(value) || isPlainObject(value)) && Object.isExtensible(value) && !value._isVue) {
        ob = new Observer(value);
      }

      if (asRootData && ob) {
        ob.vmCount++;
      }

      return ob;
    }
    /**
     * Define a reactive property on an Object.
     */


    function defineReactive$$1(obj, key, val, customSetter, shallow) {
      var dep = new Dep();
      var property = Object.getOwnPropertyDescriptor(obj, key);

      if (property && property.configurable === false) {
        return;
      } // cater for pre-defined getter/setters


      var getter = property && property.get;
      var setter = property && property.set;

      if ((!getter || setter) && arguments.length === 2) {
        val = obj[key];
      }

      var childOb = !shallow && observe(val);
      Object.defineProperty(obj, key, {
        enumerable: true,
        configurable: true,
        get: function reactiveGetter() {
          var value = getter ? getter.call(obj) : val;

          if (Dep.target) {
            dep.depend();

            if (childOb) {
              childOb.dep.depend();

              if (Array.isArray(value)) {
                dependArray(value);
              }
            }
          }

          return value;
        },
        set: function reactiveSetter(newVal) {
          var value = getter ? getter.call(obj) : val;
          /* eslint-disable no-self-compare */

          if (newVal === value || newVal !== newVal && value !== value) {
            return;
          }
          /* eslint-enable no-self-compare */


          if (customSetter) {
            customSetter();
          } // #7981: for accessor properties without setter


          if (getter && !setter) {
            return;
          }

          if (setter) {
            setter.call(obj, newVal);
          } else {
            val = newVal;
          }

          childOb = !shallow && observe(newVal);
          dep.notify();
        }
      });
    }
    /**
     * Set a property on an object. Adds the new property and
     * triggers change notification if the property doesn't
     * already exist.
     */


    function set(target, key, val) {
      if (isUndef(target) || isPrimitive(target)) {
        warn("Cannot set reactive property on undefined, null, or primitive value: " + target);
      }

      if (Array.isArray(target) && isValidArrayIndex(key)) {
        target.length = Math.max(target.length, key);
        target.splice(key, 1, val);
        return val;
      }

      if (key in target && !(key in Object.prototype)) {
        target[key] = val;
        return val;
      }

      var ob = target.__ob__;

      if (target._isVue || ob && ob.vmCount) {
        warn('Avoid adding reactive properties to a Vue instance or its root $data ' + 'at runtime - declare it upfront in the data option.');
        return val;
      }

      if (!ob) {
        target[key] = val;
        return val;
      }

      defineReactive$$1(ob.value, key, val);
      ob.dep.notify();
      return val;
    }
    /**
     * Delete a property and trigger change if necessary.
     */


    function del(target, key) {
      if (isUndef(target) || isPrimitive(target)) {
        warn("Cannot delete reactive property on undefined, null, or primitive value: " + target);
      }

      if (Array.isArray(target) && isValidArrayIndex(key)) {
        target.splice(key, 1);
        return;
      }

      var ob = target.__ob__;

      if (target._isVue || ob && ob.vmCount) {
        warn('Avoid deleting properties on a Vue instance or its root $data ' + '- just set it to null.');
        return;
      }

      if (!hasOwn(target, key)) {
        return;
      }

      delete target[key];

      if (!ob) {
        return;
      }

      ob.dep.notify();
    }
    /**
     * Collect dependencies on array elements when the array is touched, since
     * we cannot intercept array element access like property getters.
     */


    function dependArray(value) {
      for (var e = void 0, i = 0, l = value.length; i < l; i++) {
        e = value[i];
        e && e.__ob__ && e.__ob__.dep.depend();

        if (Array.isArray(e)) {
          dependArray(e);
        }
      }
    }
    /*  */

    /**
     * Option overwriting strategies are functions that handle
     * how to merge a parent option value and a child option
     * value into the final value.
     */


    var strats = config.optionMergeStrategies;
    /**
     * Options with restrictions
     */

    {
      strats.el = strats.propsData = function (parent, child, vm, key) {
        if (!vm) {
          warn("option \"" + key + "\" can only be used during instance " + 'creation with the `new` keyword.');
        }

        return defaultStrat(parent, child);
      };
    }
    /**
     * Helper that recursively merges two data objects together.
     */

    function mergeData(to, from) {
      if (!from) {
        return to;
      }

      var key, toVal, fromVal;
      var keys = hasSymbol ? Reflect.ownKeys(from) : Object.keys(from);

      for (var i = 0; i < keys.length; i++) {
        key = keys[i]; // in case the object is already observed...

        if (key === '__ob__') {
          continue;
        }

        toVal = to[key];
        fromVal = from[key];

        if (!hasOwn(to, key)) {
          set(to, key, fromVal);
        } else if (toVal !== fromVal && isPlainObject(toVal) && isPlainObject(fromVal)) {
          mergeData(toVal, fromVal);
        }
      }

      return to;
    }
    /**
     * Data
     */


    function mergeDataOrFn(parentVal, childVal, vm) {
      if (!vm) {
        // in a Vue.extend merge, both should be functions
        if (!childVal) {
          return parentVal;
        }

        if (!parentVal) {
          return childVal;
        } // when parentVal & childVal are both present,
        // we need to return a function that returns the
        // merged result of both functions... no need to
        // check if parentVal is a function here because
        // it has to be a function to pass previous merges.


        return function mergedDataFn() {
          return mergeData(typeof childVal === 'function' ? childVal.call(this, this) : childVal, typeof parentVal === 'function' ? parentVal.call(this, this) : parentVal);
        };
      } else {
        return function mergedInstanceDataFn() {
          // instance merge
          var instanceData = typeof childVal === 'function' ? childVal.call(vm, vm) : childVal;
          var defaultData = typeof parentVal === 'function' ? parentVal.call(vm, vm) : parentVal;

          if (instanceData) {
            return mergeData(instanceData, defaultData);
          } else {
            return defaultData;
          }
        };
      }
    }

    strats.data = function (parentVal, childVal, vm) {
      if (!vm) {
        if (childVal && typeof childVal !== 'function') {
          warn('The "data" option should be a function ' + 'that returns a per-instance value in component ' + 'definitions.', vm);
          return parentVal;
        }

        return mergeDataOrFn(parentVal, childVal);
      }

      return mergeDataOrFn(parentVal, childVal, vm);
    };
    /**
     * Hooks and props are merged as arrays.
     */


    function mergeHook(parentVal, childVal) {
      var res = childVal ? parentVal ? parentVal.concat(childVal) : Array.isArray(childVal) ? childVal : [childVal] : parentVal;
      return res ? dedupeHooks(res) : res;
    }

    function dedupeHooks(hooks) {
      var res = [];

      for (var i = 0; i < hooks.length; i++) {
        if (res.indexOf(hooks[i]) === -1) {
          res.push(hooks[i]);
        }
      }

      return res;
    }

    LIFECYCLE_HOOKS.forEach(function (hook) {
      strats[hook] = mergeHook;
    });
    /**
     * Assets
     *
     * When a vm is present (instance creation), we need to do
     * a three-way merge between constructor options, instance
     * options and parent options.
     */

    function mergeAssets(parentVal, childVal, vm, key) {
      var res = Object.create(parentVal || null);

      if (childVal) {
        assertObjectType(key, childVal, vm);
        return extend(res, childVal);
      } else {
        return res;
      }
    }

    ASSET_TYPES.forEach(function (type) {
      strats[type + 's'] = mergeAssets;
    });
    /**
     * Watchers.
     *
     * Watchers hashes should not overwrite one
     * another, so we merge them as arrays.
     */

    strats.watch = function (parentVal, childVal, vm, key) {
      // work around Firefox's Object.prototype.watch...
      if (parentVal === nativeWatch) {
        parentVal = undefined;
      }

      if (childVal === nativeWatch) {
        childVal = undefined;
      }
      /* istanbul ignore if */


      if (!childVal) {
        return Object.create(parentVal || null);
      }

      {
        assertObjectType(key, childVal, vm);
      }

      if (!parentVal) {
        return childVal;
      }

      var ret = {};
      extend(ret, parentVal);

      for (var key$1 in childVal) {
        var parent = ret[key$1];
        var child = childVal[key$1];

        if (parent && !Array.isArray(parent)) {
          parent = [parent];
        }

        ret[key$1] = parent ? parent.concat(child) : Array.isArray(child) ? child : [child];
      }

      return ret;
    };
    /**
     * Other object hashes.
     */


    strats.props = strats.methods = strats.inject = strats.computed = function (parentVal, childVal, vm, key) {
      if (childVal && "development" !== 'production') {
        assertObjectType(key, childVal, vm);
      }

      if (!parentVal) {
        return childVal;
      }

      var ret = Object.create(null);
      extend(ret, parentVal);

      if (childVal) {
        extend(ret, childVal);
      }

      return ret;
    };

    strats.provide = mergeDataOrFn;
    /**
     * Default strategy.
     */

    var defaultStrat = function defaultStrat(parentVal, childVal) {
      return childVal === undefined ? parentVal : childVal;
    };
    /**
     * Validate component names
     */


    function checkComponents(options) {
      for (var key in options.components) {
        validateComponentName(key);
      }
    }

    function validateComponentName(name) {
      if (!new RegExp("^[a-zA-Z][\\-\\.0-9_" + unicodeRegExp.source + "]*$").test(name)) {
        warn('Invalid component name: "' + name + '". Component names ' + 'should conform to valid custom element name in html5 specification.');
      }

      if (isBuiltInTag(name) || config.isReservedTag(name)) {
        warn('Do not use built-in or reserved HTML elements as component ' + 'id: ' + name);
      }
    }
    /**
     * Ensure all props option syntax are normalized into the
     * Object-based format.
     */


    function normalizeProps(options, vm) {
      var props = options.props;

      if (!props) {
        return;
      }

      var res = {};
      var i, val, name;

      if (Array.isArray(props)) {
        i = props.length;

        while (i--) {
          val = props[i];

          if (typeof val === 'string') {
            name = camelize(val);
            res[name] = {
              type: null
            };
          } else {
            warn('props must be strings when using array syntax.');
          }
        }
      } else if (isPlainObject(props)) {
        for (var key in props) {
          val = props[key];
          name = camelize(key);
          res[name] = isPlainObject(val) ? val : {
            type: val
          };
        }
      } else {
        warn("Invalid value for option \"props\": expected an Array or an Object, " + "but got " + toRawType(props) + ".", vm);
      }

      options.props = res;
    }
    /**
     * Normalize all injections into Object-based format
     */


    function normalizeInject(options, vm) {
      var inject = options.inject;

      if (!inject) {
        return;
      }

      var normalized = options.inject = {};

      if (Array.isArray(inject)) {
        for (var i = 0; i < inject.length; i++) {
          normalized[inject[i]] = {
            from: inject[i]
          };
        }
      } else if (isPlainObject(inject)) {
        for (var key in inject) {
          var val = inject[key];
          normalized[key] = isPlainObject(val) ? extend({
            from: key
          }, val) : {
            from: val
          };
        }
      } else {
        warn("Invalid value for option \"inject\": expected an Array or an Object, " + "but got " + toRawType(inject) + ".", vm);
      }
    }
    /**
     * Normalize raw function directives into object format.
     */


    function normalizeDirectives(options) {
      var dirs = options.directives;

      if (dirs) {
        for (var key in dirs) {
          var def$$1 = dirs[key];

          if (typeof def$$1 === 'function') {
            dirs[key] = {
              bind: def$$1,
              update: def$$1
            };
          }
        }
      }
    }

    function assertObjectType(name, value, vm) {
      if (!isPlainObject(value)) {
        warn("Invalid value for option \"" + name + "\": expected an Object, " + "but got " + toRawType(value) + ".", vm);
      }
    }
    /**
     * Merge two option objects into a new one.
     * Core utility used in both instantiation and inheritance.
     */


    function mergeOptions(parent, child, vm) {
      {
        checkComponents(child);
      }

      if (typeof child === 'function') {
        child = child.options;
      }

      normalizeProps(child, vm);
      normalizeInject(child, vm);
      normalizeDirectives(child); // Apply extends and mixins on the child options,
      // but only if it is a raw options object that isn't
      // the result of another mergeOptions call.
      // Only merged options has the _base property.

      if (!child._base) {
        if (child.extends) {
          parent = mergeOptions(parent, child.extends, vm);
        }

        if (child.mixins) {
          for (var i = 0, l = child.mixins.length; i < l; i++) {
            parent = mergeOptions(parent, child.mixins[i], vm);
          }
        }
      }

      var options = {};
      var key;

      for (key in parent) {
        mergeField(key);
      }

      for (key in child) {
        if (!hasOwn(parent, key)) {
          mergeField(key);
        }
      }

      function mergeField(key) {
        var strat = strats[key] || defaultStrat;
        options[key] = strat(parent[key], child[key], vm, key);
      }

      return options;
    }
    /**
     * Resolve an asset.
     * This function is used because child instances need access
     * to assets defined in its ancestor chain.
     */


    function resolveAsset(options, type, id, warnMissing) {
      /* istanbul ignore if */
      if (typeof id !== 'string') {
        return;
      }

      var assets = options[type]; // check local registration variations first

      if (hasOwn(assets, id)) {
        return assets[id];
      }

      var camelizedId = camelize(id);

      if (hasOwn(assets, camelizedId)) {
        return assets[camelizedId];
      }

      var PascalCaseId = capitalize(camelizedId);

      if (hasOwn(assets, PascalCaseId)) {
        return assets[PascalCaseId];
      } // fallback to prototype chain


      var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];

      if (warnMissing && !res) {
        warn('Failed to resolve ' + type.slice(0, -1) + ': ' + id, options);
      }

      return res;
    }
    /*  */


    function validateProp(key, propOptions, propsData, vm) {
      var prop = propOptions[key];
      var absent = !hasOwn(propsData, key);
      var value = propsData[key]; // boolean casting

      var booleanIndex = getTypeIndex(Boolean, prop.type);

      if (booleanIndex > -1) {
        if (absent && !hasOwn(prop, 'default')) {
          value = false;
        } else if (value === '' || value === hyphenate(key)) {
          // only cast empty string / same name to boolean if
          // boolean has higher priority
          var stringIndex = getTypeIndex(String, prop.type);

          if (stringIndex < 0 || booleanIndex < stringIndex) {
            value = true;
          }
        }
      } // check default value


      if (value === undefined) {
        value = getPropDefaultValue(vm, prop, key); // since the default value is a fresh copy,
        // make sure to observe it.

        var prevShouldObserve = shouldObserve;
        toggleObserving(true);
        observe(value);
        toggleObserving(prevShouldObserve);
      }

      {
        assertProp(prop, key, value, vm, absent);
      }
      return value;
    }
    /**
     * Get the default value of a prop.
     */


    function getPropDefaultValue(vm, prop, key) {
      // no default, return undefined
      if (!hasOwn(prop, 'default')) {
        return undefined;
      }

      var def = prop.default; // warn against non-factory defaults for Object & Array

      if (isObject(def)) {
        warn('Invalid default value for prop "' + key + '": ' + 'Props with type Object/Array must use a factory function ' + 'to return the default value.', vm);
      } // the raw prop value was also undefined from previous render,
      // return previous default value to avoid unnecessary watcher trigger


      if (vm && vm.$options.propsData && vm.$options.propsData[key] === undefined && vm._props[key] !== undefined) {
        return vm._props[key];
      } // call factory function for non-Function types
      // a value is Function if its prototype is function even across different execution context


      return typeof def === 'function' && getType(prop.type) !== 'Function' ? def.call(vm) : def;
    }
    /**
     * Assert whether a prop is valid.
     */


    function assertProp(prop, name, value, vm, absent) {
      if (prop.required && absent) {
        warn('Missing required prop: "' + name + '"', vm);
        return;
      }

      if (value == null && !prop.required) {
        return;
      }

      var type = prop.type;
      var valid = !type || type === true;
      var expectedTypes = [];

      if (type) {
        if (!Array.isArray(type)) {
          type = [type];
        }

        for (var i = 0; i < type.length && !valid; i++) {
          var assertedType = assertType(value, type[i]);
          expectedTypes.push(assertedType.expectedType || '');
          valid = assertedType.valid;
        }
      }

      if (!valid) {
        warn(getInvalidTypeMessage(name, value, expectedTypes), vm);
        return;
      }

      var validator = prop.validator;

      if (validator) {
        if (!validator(value)) {
          warn('Invalid prop: custom validator check failed for prop "' + name + '".', vm);
        }
      }
    }

    var simpleCheckRE = /^(String|Number|Boolean|Function|Symbol)$/;

    function assertType(value, type) {
      var valid;
      var expectedType = getType(type);

      if (simpleCheckRE.test(expectedType)) {
        var t = babelHelpers.typeof(value);
        valid = t === expectedType.toLowerCase(); // for primitive wrapper objects

        if (!valid && t === 'object') {
          valid = value instanceof type;
        }
      } else if (expectedType === 'Object') {
        valid = isPlainObject(value);
      } else if (expectedType === 'Array') {
        valid = Array.isArray(value);
      } else {
        valid = value instanceof type;
      }

      return {
        valid: valid,
        expectedType: expectedType
      };
    }
    /**
     * Use function string name to check built-in types,
     * because a simple equality check will fail when running
     * across different vms / iframes.
     */


    function getType(fn) {
      var match = fn && fn.toString().match(/^\s*function (\w+)/);
      return match ? match[1] : '';
    }

    function isSameType(a, b) {
      return getType(a) === getType(b);
    }

    function getTypeIndex(type, expectedTypes) {
      if (!Array.isArray(expectedTypes)) {
        return isSameType(expectedTypes, type) ? 0 : -1;
      }

      for (var i = 0, len = expectedTypes.length; i < len; i++) {
        if (isSameType(expectedTypes[i], type)) {
          return i;
        }
      }

      return -1;
    }

    function getInvalidTypeMessage(name, value, expectedTypes) {
      var message = "Invalid prop: type check failed for prop \"" + name + "\"." + " Expected " + expectedTypes.map(capitalize).join(', ');
      var expectedType = expectedTypes[0];
      var receivedType = toRawType(value);
      var expectedValue = styleValue(value, expectedType);
      var receivedValue = styleValue(value, receivedType); // check if we need to specify expected value

      if (expectedTypes.length === 1 && isExplicable(expectedType) && !isBoolean(expectedType, receivedType)) {
        message += " with value " + expectedValue;
      }

      message += ", got " + receivedType + " "; // check if we need to specify received value

      if (isExplicable(receivedType)) {
        message += "with value " + receivedValue + ".";
      }

      return message;
    }

    function styleValue(value, type) {
      if (type === 'String') {
        return "\"" + value + "\"";
      } else if (type === 'Number') {
        return "" + Number(value);
      } else {
        return "" + value;
      }
    }

    function isExplicable(value) {
      var explicitTypes = ['string', 'number', 'boolean'];
      return explicitTypes.some(function (elem) {
        return value.toLowerCase() === elem;
      });
    }

    function isBoolean() {
      var args = [],
          len = arguments.length;

      while (len--) {
        args[len] = arguments[len];
      }

      return args.some(function (elem) {
        return elem.toLowerCase() === 'boolean';
      });
    }
    /*  */


    function handleError(err, vm, info) {
      // Deactivate deps tracking while processing error handler to avoid possible infinite rendering.
      // See: https://github.com/vuejs/vuex/issues/1505
      pushTarget();

      try {
        if (vm) {
          var cur = vm;

          while (cur = cur.$parent) {
            var hooks = cur.$options.errorCaptured;

            if (hooks) {
              for (var i = 0; i < hooks.length; i++) {
                try {
                  var capture = hooks[i].call(cur, err, vm, info) === false;

                  if (capture) {
                    return;
                  }
                } catch (e) {
                  globalHandleError(e, cur, 'errorCaptured hook');
                }
              }
            }
          }
        }

        globalHandleError(err, vm, info);
      } finally {
        popTarget();
      }
    }

    function invokeWithErrorHandling(handler, context, args, vm, info) {
      var res;

      try {
        res = args ? handler.apply(context, args) : handler.call(context);

        if (res && !res._isVue && isPromise(res) && !res._handled) {
          res.catch(function (e) {
            return handleError(e, vm, info + " (Promise/async)");
          }); // issue #9511
          // avoid catch triggering multiple times when nested calls

          res._handled = true;
        }
      } catch (e) {
        handleError(e, vm, info);
      }

      return res;
    }

    function globalHandleError(err, vm, info) {
      if (config.errorHandler) {
        try {
          return config.errorHandler.call(null, err, vm, info);
        } catch (e) {
          // if the user intentionally throws the original error in the handler,
          // do not log it twice
          if (e !== err) {
            logError(e, null, 'config.errorHandler');
          }
        }
      }

      logError(err, vm, info);
    }

    function logError(err, vm, info) {
      {
        warn("Error in " + info + ": \"" + err.toString() + "\"", vm);
      }
      /* istanbul ignore else */

      if ((inBrowser || inWeex) && typeof console !== 'undefined') {
        console.error(err);
      } else {
        throw err;
      }
    }
    /*  */


    var isUsingMicroTask = false;
    var callbacks = [];
    var pending = false;

    function flushCallbacks() {
      pending = false;
      var copies = callbacks.slice(0);
      callbacks.length = 0;

      for (var i = 0; i < copies.length; i++) {
        copies[i]();
      }
    } // Here we have async deferring wrappers using microtasks.
    // In 2.5 we used (macro) tasks (in combination with microtasks).
    // However, it has subtle problems when state is changed right before repaint
    // (e.g. #6813, out-in transitions).
    // Also, using (macro) tasks in event handler would cause some weird behaviors
    // that cannot be circumvented (e.g. #7109, #7153, #7546, #7834, #8109).
    // So we now use microtasks everywhere, again.
    // A major drawback of this tradeoff is that there are some scenarios
    // where microtasks have too high a priority and fire in between supposedly
    // sequential events (e.g. #4521, #6690, which have workarounds)
    // or even between bubbling of the same event (#6566).


    var timerFunc; // The nextTick behavior leverages the microtask queue, which can be accessed
    // via either native Promise.then or MutationObserver.
    // MutationObserver has wider support, however it is seriously bugged in
    // UIWebView in iOS >= 9.3.3 when triggered in touch event handlers. It
    // completely stops working after triggering a few times... so, if native
    // Promise is available, we will use it:

    /* istanbul ignore next, $flow-disable-line */

    if (typeof Promise !== 'undefined' && isNative(Promise)) {
      var p = Promise.resolve();

      timerFunc = function timerFunc() {
        p.then(flushCallbacks); // In problematic UIWebViews, Promise.then doesn't completely break, but
        // it can get stuck in a weird state where callbacks are pushed into the
        // microtask queue but the queue isn't being flushed, until the browser
        // needs to do some other work, e.g. handle a timer. Therefore we can
        // "force" the microtask queue to be flushed by adding an empty timer.

        if (isIOS) {
          setTimeout(noop);
        }
      };

      isUsingMicroTask = true;
    } else if (!isIE && typeof MutationObserver !== 'undefined' && (isNative(MutationObserver) || // PhantomJS and iOS 7.x
    MutationObserver.toString() === '[object MutationObserverConstructor]')) {
      // Use MutationObserver where native Promise is not available,
      // e.g. PhantomJS, iOS7, Android 4.4
      // (#6466 MutationObserver is unreliable in IE11)
      var counter = 1;
      var observer = new MutationObserver(flushCallbacks);
      var textNode = document.createTextNode(String(counter));
      observer.observe(textNode, {
        characterData: true
      });

      timerFunc = function timerFunc() {
        counter = (counter + 1) % 2;
        textNode.data = String(counter);
      };

      isUsingMicroTask = true;
    } else if (typeof setImmediate !== 'undefined' && isNative(setImmediate)) {
      // Fallback to setImmediate.
      // Technically it leverages the (macro) task queue,
      // but it is still a better choice than setTimeout.
      timerFunc = function timerFunc() {
        setImmediate(flushCallbacks);
      };
    } else {
      // Fallback to setTimeout.
      timerFunc = function timerFunc() {
        setTimeout(flushCallbacks, 0);
      };
    }

    function nextTick(cb, ctx) {
      var _resolve;

      callbacks.push(function () {
        if (cb) {
          try {
            cb.call(ctx);
          } catch (e) {
            handleError(e, ctx, 'nextTick');
          }
        } else if (_resolve) {
          _resolve(ctx);
        }
      });

      if (!pending) {
        pending = true;
        timerFunc();
      } // $flow-disable-line


      if (!cb && typeof Promise !== 'undefined') {
        return new Promise(function (resolve) {
          _resolve = resolve;
        });
      }
    }
    /*  */


    var mark;
    var measure;
    {
      var perf = inBrowser && window.performance;
      /* istanbul ignore if */

      if (perf && perf.mark && perf.measure && perf.clearMarks && perf.clearMeasures) {
        mark = function mark(tag) {
          return perf.mark(tag);
        };

        measure = function measure(name, startTag, endTag) {
          perf.measure(name, startTag, endTag);
          perf.clearMarks(startTag);
          perf.clearMarks(endTag); // perf.clearMeasures(name)
        };
      }
    }
    /* not type checking this file because flow doesn't play well with Proxy */

    var initProxy;
    {
      var allowedGlobals = makeMap('Infinity,undefined,NaN,isFinite,isNaN,' + 'parseFloat,parseInt,decodeURI,decodeURIComponent,encodeURI,encodeURIComponent,' + 'Math,Number,Date,Array,Object,Boolean,String,RegExp,Map,Set,JSON,Intl,' + 'require' // for Webpack/Browserify
      );

      var warnNonPresent = function warnNonPresent(target, key) {
        warn("Property or method \"" + key + "\" is not defined on the instance but " + 'referenced during render. Make sure that this property is reactive, ' + 'either in the data option, or for class-based components, by ' + 'initializing the property. ' + 'See: https://vuejs.org/v2/guide/reactivity.html#Declaring-Reactive-Properties.', target);
      };

      var warnReservedPrefix = function warnReservedPrefix(target, key) {
        warn("Property \"" + key + "\" must be accessed with \"$data." + key + "\" because " + 'properties starting with "$" or "_" are not proxied in the Vue instance to ' + 'prevent conflicts with Vue internals. ' + 'See: https://vuejs.org/v2/api/#data', target);
      };

      var hasProxy = typeof Proxy !== 'undefined' && isNative(Proxy);

      if (hasProxy) {
        var isBuiltInModifier = makeMap('stop,prevent,self,ctrl,shift,alt,meta,exact');
        config.keyCodes = new Proxy(config.keyCodes, {
          set: function set(target, key, value) {
            if (isBuiltInModifier(key)) {
              warn("Avoid overwriting built-in modifier in config.keyCodes: ." + key);
              return false;
            } else {
              target[key] = value;
              return true;
            }
          }
        });
      }

      var hasHandler = {
        has: function has(target, key) {
          var has = (key in target);
          var isAllowed = allowedGlobals(key) || typeof key === 'string' && key.charAt(0) === '_' && !(key in target.$data);

          if (!has && !isAllowed) {
            if (key in target.$data) {
              warnReservedPrefix(target, key);
            } else {
              warnNonPresent(target, key);
            }
          }

          return has || !isAllowed;
        }
      };
      var getHandler = {
        get: function get(target, key) {
          if (typeof key === 'string' && !(key in target)) {
            if (key in target.$data) {
              warnReservedPrefix(target, key);
            } else {
              warnNonPresent(target, key);
            }
          }

          return target[key];
        }
      };

      initProxy = function initProxy(vm) {
        if (hasProxy) {
          // determine which proxy handler to use
          var options = vm.$options;
          var handlers = options.render && options.render._withStripped ? getHandler : hasHandler;
          vm._renderProxy = new Proxy(vm, handlers);
        } else {
          vm._renderProxy = vm;
        }
      };
    }
    /*  */

    var seenObjects = new _Set();
    /**
     * Recursively traverse an object to evoke all converted
     * getters, so that every nested property inside the object
     * is collected as a "deep" dependency.
     */

    function traverse(val) {
      _traverse(val, seenObjects);

      seenObjects.clear();
    }

    function _traverse(val, seen) {
      var i, keys;
      var isA = Array.isArray(val);

      if (!isA && !isObject(val) || Object.isFrozen(val) || val instanceof VNode) {
        return;
      }

      if (val.__ob__) {
        var depId = val.__ob__.dep.id;

        if (seen.has(depId)) {
          return;
        }

        seen.add(depId);
      }

      if (isA) {
        i = val.length;

        while (i--) {
          _traverse(val[i], seen);
        }
      } else {
        keys = Object.keys(val);
        i = keys.length;

        while (i--) {
          _traverse(val[keys[i]], seen);
        }
      }
    }
    /*  */


    var normalizeEvent = cached(function (name) {
      var passive = name.charAt(0) === '&';
      name = passive ? name.slice(1) : name;
      var once$$1 = name.charAt(0) === '~'; // Prefixed last, checked first

      name = once$$1 ? name.slice(1) : name;
      var capture = name.charAt(0) === '!';
      name = capture ? name.slice(1) : name;
      return {
        name: name,
        once: once$$1,
        capture: capture,
        passive: passive
      };
    });

    function createFnInvoker(fns, vm) {
      function invoker() {
        var arguments$1 = arguments;
        var fns = invoker.fns;

        if (Array.isArray(fns)) {
          var cloned = fns.slice();

          for (var i = 0; i < cloned.length; i++) {
            invokeWithErrorHandling(cloned[i], null, arguments$1, vm, "v-on handler");
          }
        } else {
          // return handler return value for single handlers
          return invokeWithErrorHandling(fns, null, arguments, vm, "v-on handler");
        }
      }

      invoker.fns = fns;
      return invoker;
    }

    function updateListeners(on, oldOn, add, remove$$1, createOnceHandler, vm) {
      var name, def$$1, cur, old, event;

      for (name in on) {
        def$$1 = cur = on[name];
        old = oldOn[name];
        event = normalizeEvent(name);

        if (isUndef(cur)) {
          warn("Invalid handler for event \"" + event.name + "\": got " + String(cur), vm);
        } else if (isUndef(old)) {
          if (isUndef(cur.fns)) {
            cur = on[name] = createFnInvoker(cur, vm);
          }

          if (isTrue(event.once)) {
            cur = on[name] = createOnceHandler(event.name, cur, event.capture);
          }

          add(event.name, cur, event.capture, event.passive, event.params);
        } else if (cur !== old) {
          old.fns = cur;
          on[name] = old;
        }
      }

      for (name in oldOn) {
        if (isUndef(on[name])) {
          event = normalizeEvent(name);
          remove$$1(event.name, oldOn[name], event.capture);
        }
      }
    }
    /*  */


    function mergeVNodeHook(def, hookKey, hook) {
      if (def instanceof VNode) {
        def = def.data.hook || (def.data.hook = {});
      }

      var invoker;
      var oldHook = def[hookKey];

      function wrappedHook() {
        hook.apply(this, arguments); // important: remove merged hook to ensure it's called only once
        // and prevent memory leak

        remove(invoker.fns, wrappedHook);
      }

      if (isUndef(oldHook)) {
        // no existing hook
        invoker = createFnInvoker([wrappedHook]);
      } else {
        /* istanbul ignore if */
        if (isDef(oldHook.fns) && isTrue(oldHook.merged)) {
          // already a merged invoker
          invoker = oldHook;
          invoker.fns.push(wrappedHook);
        } else {
          // existing plain hook
          invoker = createFnInvoker([oldHook, wrappedHook]);
        }
      }

      invoker.merged = true;
      def[hookKey] = invoker;
    }
    /*  */


    function extractPropsFromVNodeData(data, Ctor, tag) {
      // we are only extracting raw values here.
      // validation and default values are handled in the child
      // component itself.
      var propOptions = Ctor.options.props;

      if (isUndef(propOptions)) {
        return;
      }

      var res = {};
      var attrs = data.attrs;
      var props = data.props;

      if (isDef(attrs) || isDef(props)) {
        for (var key in propOptions) {
          var altKey = hyphenate(key);
          {
            var keyInLowerCase = key.toLowerCase();

            if (key !== keyInLowerCase && attrs && hasOwn(attrs, keyInLowerCase)) {
              tip("Prop \"" + keyInLowerCase + "\" is passed to component " + formatComponentName(tag || Ctor) + ", but the declared prop name is" + " \"" + key + "\". " + "Note that HTML attributes are case-insensitive and camelCased " + "props need to use their kebab-case equivalents when using in-DOM " + "templates. You should probably use \"" + altKey + "\" instead of \"" + key + "\".");
            }
          }
          checkProp(res, props, key, altKey, true) || checkProp(res, attrs, key, altKey, false);
        }
      }

      return res;
    }

    function checkProp(res, hash, key, altKey, preserve) {
      if (isDef(hash)) {
        if (hasOwn(hash, key)) {
          res[key] = hash[key];

          if (!preserve) {
            delete hash[key];
          }

          return true;
        } else if (hasOwn(hash, altKey)) {
          res[key] = hash[altKey];

          if (!preserve) {
            delete hash[altKey];
          }

          return true;
        }
      }

      return false;
    }
    /*  */
    // The template compiler attempts to minimize the need for normalization by
    // statically analyzing the template at compile time.
    //
    // For plain HTML markup, normalization can be completely skipped because the
    // generated render function is guaranteed to return Array<VNode>. There are
    // two cases where extra normalization is needed:
    // 1. When the children contains components - because a functional component
    // may return an Array instead of a single root. In this case, just a simple
    // normalization is needed - if any child is an Array, we flatten the whole
    // thing with Array.prototype.concat. It is guaranteed to be only 1-level deep
    // because functional components already normalize their own children.


    function simpleNormalizeChildren(children) {
      for (var i = 0; i < children.length; i++) {
        if (Array.isArray(children[i])) {
          return Array.prototype.concat.apply([], children);
        }
      }

      return children;
    } // 2. When the children contains constructs that always generated nested Arrays,
    // e.g. <template>, <slot>, v-for, or when the children is provided by user
    // with hand-written render functions / JSX. In such cases a full normalization
    // is needed to cater to all possible types of children values.


    function normalizeChildren(children) {
      return isPrimitive(children) ? [createTextVNode(children)] : Array.isArray(children) ? normalizeArrayChildren(children) : undefined;
    }

    function isTextNode(node) {
      return isDef(node) && isDef(node.text) && isFalse(node.isComment);
    }

    function normalizeArrayChildren(children, nestedIndex) {
      var res = [];
      var i, c, lastIndex, last;

      for (i = 0; i < children.length; i++) {
        c = children[i];

        if (isUndef(c) || typeof c === 'boolean') {
          continue;
        }

        lastIndex = res.length - 1;
        last = res[lastIndex]; //  nested

        if (Array.isArray(c)) {
          if (c.length > 0) {
            c = normalizeArrayChildren(c, (nestedIndex || '') + "_" + i); // merge adjacent text nodes

            if (isTextNode(c[0]) && isTextNode(last)) {
              res[lastIndex] = createTextVNode(last.text + c[0].text);
              c.shift();
            }

            res.push.apply(res, c);
          }
        } else if (isPrimitive(c)) {
          if (isTextNode(last)) {
            // merge adjacent text nodes
            // this is necessary for SSR hydration because text nodes are
            // essentially merged when rendered to HTML strings
            res[lastIndex] = createTextVNode(last.text + c);
          } else if (c !== '') {
            // convert primitive to vnode
            res.push(createTextVNode(c));
          }
        } else {
          if (isTextNode(c) && isTextNode(last)) {
            // merge adjacent text nodes
            res[lastIndex] = createTextVNode(last.text + c.text);
          } else {
            // default key for nested array children (likely generated by v-for)
            if (isTrue(children._isVList) && isDef(c.tag) && isUndef(c.key) && isDef(nestedIndex)) {
              c.key = "__vlist" + nestedIndex + "_" + i + "__";
            }

            res.push(c);
          }
        }
      }

      return res;
    }
    /*  */


    function initProvide(vm) {
      var provide = vm.$options.provide;

      if (provide) {
        vm._provided = typeof provide === 'function' ? provide.call(vm) : provide;
      }
    }

    function initInjections(vm) {
      var result = resolveInject(vm.$options.inject, vm);

      if (result) {
        toggleObserving(false);
        Object.keys(result).forEach(function (key) {
          /* istanbul ignore else */
          {
            defineReactive$$1(vm, key, result[key], function () {
              warn("Avoid mutating an injected value directly since the changes will be " + "overwritten whenever the provided component re-renders. " + "injection being mutated: \"" + key + "\"", vm);
            });
          }
        });
        toggleObserving(true);
      }
    }

    function resolveInject(inject, vm) {
      if (inject) {
        // inject is :any because flow is not smart enough to figure out cached
        var result = Object.create(null);
        var keys = hasSymbol ? Reflect.ownKeys(inject) : Object.keys(inject);

        for (var i = 0; i < keys.length; i++) {
          var key = keys[i]; // #6574 in case the inject object is observed...

          if (key === '__ob__') {
            continue;
          }

          var provideKey = inject[key].from;
          var source = vm;

          while (source) {
            if (source._provided && hasOwn(source._provided, provideKey)) {
              result[key] = source._provided[provideKey];
              break;
            }

            source = source.$parent;
          }

          if (!source) {
            if ('default' in inject[key]) {
              var provideDefault = inject[key].default;
              result[key] = typeof provideDefault === 'function' ? provideDefault.call(vm) : provideDefault;
            } else {
              warn("Injection \"" + key + "\" not found", vm);
            }
          }
        }

        return result;
      }
    }
    /*  */

    /**
     * Runtime helper for resolving raw children VNodes into a slot object.
     */


    function resolveSlots(children, context) {
      if (!children || !children.length) {
        return {};
      }

      var slots = {};

      for (var i = 0, l = children.length; i < l; i++) {
        var child = children[i];
        var data = child.data; // remove slot attribute if the node is resolved as a Vue slot node

        if (data && data.attrs && data.attrs.slot) {
          delete data.attrs.slot;
        } // named slots should only be respected if the vnode was rendered in the
        // same context.


        if ((child.context === context || child.fnContext === context) && data && data.slot != null) {
          var name = data.slot;
          var slot = slots[name] || (slots[name] = []);

          if (child.tag === 'template') {
            slot.push.apply(slot, child.children || []);
          } else {
            slot.push(child);
          }
        } else {
          (slots.default || (slots.default = [])).push(child);
        }
      } // ignore slots that contains only whitespace


      for (var name$1 in slots) {
        if (slots[name$1].every(isWhitespace)) {
          delete slots[name$1];
        }
      }

      return slots;
    }

    function isWhitespace(node) {
      return node.isComment && !node.asyncFactory || node.text === ' ';
    }
    /*  */


    function normalizeScopedSlots(slots, normalSlots, prevSlots) {
      var res;
      var hasNormalSlots = Object.keys(normalSlots).length > 0;
      var isStable = slots ? !!slots.$stable : !hasNormalSlots;
      var key = slots && slots.$key;

      if (!slots) {
        res = {};
      } else if (slots._normalized) {
        // fast path 1: child component re-render only, parent did not change
        return slots._normalized;
      } else if (isStable && prevSlots && prevSlots !== emptyObject && key === prevSlots.$key && !hasNormalSlots && !prevSlots.$hasNormal) {
        // fast path 2: stable scoped slots w/ no normal slots to proxy,
        // only need to normalize once
        return prevSlots;
      } else {
        res = {};

        for (var key$1 in slots) {
          if (slots[key$1] && key$1[0] !== '$') {
            res[key$1] = normalizeScopedSlot(normalSlots, key$1, slots[key$1]);
          }
        }
      } // expose normal slots on scopedSlots


      for (var key$2 in normalSlots) {
        if (!(key$2 in res)) {
          res[key$2] = proxyNormalSlot(normalSlots, key$2);
        }
      } // avoriaz seems to mock a non-extensible $scopedSlots object
      // and when that is passed down this would cause an error


      if (slots && Object.isExtensible(slots)) {
        slots._normalized = res;
      }

      def(res, '$stable', isStable);
      def(res, '$key', key);
      def(res, '$hasNormal', hasNormalSlots);
      return res;
    }

    function normalizeScopedSlot(normalSlots, key, fn) {
      var normalized = function normalized() {
        var res = arguments.length ? fn.apply(null, arguments) : fn({});
        res = res && babelHelpers.typeof(res) === 'object' && !Array.isArray(res) ? [res] // single vnode
        : normalizeChildren(res);
        return res && (res.length === 0 || res.length === 1 && res[0].isComment // #9658
        ) ? undefined : res;
      }; // this is a slot using the new v-slot syntax without scope. although it is
      // compiled as a scoped slot, render fn users would expect it to be present
      // on this.$slots because the usage is semantically a normal slot.


      if (fn.proxy) {
        Object.defineProperty(normalSlots, key, {
          get: normalized,
          enumerable: true,
          configurable: true
        });
      }

      return normalized;
    }

    function proxyNormalSlot(slots, key) {
      return function () {
        return slots[key];
      };
    }
    /*  */

    /**
     * Runtime helper for rendering v-for lists.
     */


    function renderList(val, render) {
      var ret, i, l, keys, key;

      if (Array.isArray(val) || typeof val === 'string') {
        ret = new Array(val.length);

        for (i = 0, l = val.length; i < l; i++) {
          ret[i] = render(val[i], i);
        }
      } else if (typeof val === 'number') {
        ret = new Array(val);

        for (i = 0; i < val; i++) {
          ret[i] = render(i + 1, i);
        }
      } else if (isObject(val)) {
        if (hasSymbol && val[Symbol.iterator]) {
          ret = [];
          var iterator = val[Symbol.iterator]();
          var result = iterator.next();

          while (!result.done) {
            ret.push(render(result.value, ret.length));
            result = iterator.next();
          }
        } else {
          keys = Object.keys(val);
          ret = new Array(keys.length);

          for (i = 0, l = keys.length; i < l; i++) {
            key = keys[i];
            ret[i] = render(val[key], key, i);
          }
        }
      }

      if (!isDef(ret)) {
        ret = [];
      }

      ret._isVList = true;
      return ret;
    }
    /*  */

    /**
     * Runtime helper for rendering <slot>
     */


    function renderSlot(name, fallback, props, bindObject) {
      var scopedSlotFn = this.$scopedSlots[name];
      var nodes;

      if (scopedSlotFn) {
        // scoped slot
        props = props || {};

        if (bindObject) {
          if (!isObject(bindObject)) {
            warn('slot v-bind without argument expects an Object', this);
          }

          props = extend(extend({}, bindObject), props);
        }

        nodes = scopedSlotFn(props) || fallback;
      } else {
        nodes = this.$slots[name] || fallback;
      }

      var target = props && props.slot;

      if (target) {
        return this.$createElement('template', {
          slot: target
        }, nodes);
      } else {
        return nodes;
      }
    }
    /*  */

    /**
     * Runtime helper for resolving filters
     */


    function resolveFilter(id) {
      return resolveAsset(this.$options, 'filters', id, true) || identity;
    }
    /*  */


    function isKeyNotMatch(expect, actual) {
      if (Array.isArray(expect)) {
        return expect.indexOf(actual) === -1;
      } else {
        return expect !== actual;
      }
    }
    /**
     * Runtime helper for checking keyCodes from config.
     * exposed as Vue.prototype._k
     * passing in eventKeyName as last argument separately for backwards compat
     */


    function checkKeyCodes(eventKeyCode, key, builtInKeyCode, eventKeyName, builtInKeyName) {
      var mappedKeyCode = config.keyCodes[key] || builtInKeyCode;

      if (builtInKeyName && eventKeyName && !config.keyCodes[key]) {
        return isKeyNotMatch(builtInKeyName, eventKeyName);
      } else if (mappedKeyCode) {
        return isKeyNotMatch(mappedKeyCode, eventKeyCode);
      } else if (eventKeyName) {
        return hyphenate(eventKeyName) !== key;
      }
    }
    /*  */

    /**
     * Runtime helper for merging v-bind="object" into a VNode's data.
     */


    function bindObjectProps(data, tag, value, asProp, isSync) {
      if (value) {
        if (!isObject(value)) {
          warn('v-bind without argument expects an Object or Array value', this);
        } else {
          if (Array.isArray(value)) {
            value = toObject(value);
          }

          var hash;

          var loop = function loop(key) {
            if (key === 'class' || key === 'style' || isReservedAttribute(key)) {
              hash = data;
            } else {
              var type = data.attrs && data.attrs.type;
              hash = asProp || config.mustUseProp(tag, type, key) ? data.domProps || (data.domProps = {}) : data.attrs || (data.attrs = {});
            }

            var camelizedKey = camelize(key);
            var hyphenatedKey = hyphenate(key);

            if (!(camelizedKey in hash) && !(hyphenatedKey in hash)) {
              hash[key] = value[key];

              if (isSync) {
                var on = data.on || (data.on = {});

                on["update:" + key] = function ($event) {
                  value[key] = $event;
                };
              }
            }
          };

          for (var key in value) {
            loop(key);
          }
        }
      }

      return data;
    }
    /*  */

    /**
     * Runtime helper for rendering static trees.
     */


    function renderStatic(index, isInFor) {
      var cached = this._staticTrees || (this._staticTrees = []);
      var tree = cached[index]; // if has already-rendered static tree and not inside v-for,
      // we can reuse the same tree.

      if (tree && !isInFor) {
        return tree;
      } // otherwise, render a fresh tree.


      tree = cached[index] = this.$options.staticRenderFns[index].call(this._renderProxy, null, this // for render fns generated for functional component templates
      );
      markStatic(tree, "__static__" + index, false);
      return tree;
    }
    /**
     * Runtime helper for v-once.
     * Effectively it means marking the node as static with a unique key.
     */


    function markOnce(tree, index, key) {
      markStatic(tree, "__once__" + index + (key ? "_" + key : ""), true);
      return tree;
    }

    function markStatic(tree, key, isOnce) {
      if (Array.isArray(tree)) {
        for (var i = 0; i < tree.length; i++) {
          if (tree[i] && typeof tree[i] !== 'string') {
            markStaticNode(tree[i], key + "_" + i, isOnce);
          }
        }
      } else {
        markStaticNode(tree, key, isOnce);
      }
    }

    function markStaticNode(node, key, isOnce) {
      node.isStatic = true;
      node.key = key;
      node.isOnce = isOnce;
    }
    /*  */


    function bindObjectListeners(data, value) {
      if (value) {
        if (!isPlainObject(value)) {
          warn('v-on without argument expects an Object value', this);
        } else {
          var on = data.on = data.on ? extend({}, data.on) : {};

          for (var key in value) {
            var existing = on[key];
            var ours = value[key];
            on[key] = existing ? [].concat(existing, ours) : ours;
          }
        }
      }

      return data;
    }
    /*  */


    function resolveScopedSlots(fns, // see flow/vnode
    res, // the following are added in 2.6
    hasDynamicKeys, contentHashKey) {
      res = res || {
        $stable: !hasDynamicKeys
      };

      for (var i = 0; i < fns.length; i++) {
        var slot = fns[i];

        if (Array.isArray(slot)) {
          resolveScopedSlots(slot, res, hasDynamicKeys);
        } else if (slot) {
          // marker for reverse proxying v-slot without scope on this.$slots
          if (slot.proxy) {
            slot.fn.proxy = true;
          }

          res[slot.key] = slot.fn;
        }
      }

      if (contentHashKey) {
        res.$key = contentHashKey;
      }

      return res;
    }
    /*  */


    function bindDynamicKeys(baseObj, values) {
      for (var i = 0; i < values.length; i += 2) {
        var key = values[i];

        if (typeof key === 'string' && key) {
          baseObj[values[i]] = values[i + 1];
        } else if (key !== '' && key !== null) {
          // null is a special value for explicitly removing a binding
          warn("Invalid value for dynamic directive argument (expected string or null): " + key, this);
        }
      }

      return baseObj;
    } // helper to dynamically append modifier runtime markers to event names.
    // ensure only append when value is already string, otherwise it will be cast
    // to string and cause the type check to miss.


    function prependModifier(value, symbol) {
      return typeof value === 'string' ? symbol + value : value;
    }
    /*  */


    function installRenderHelpers(target) {
      target._o = markOnce;
      target._n = toNumber;
      target._s = _toString2;
      target._l = renderList;
      target._t = renderSlot;
      target._q = looseEqual;
      target._i = looseIndexOf;
      target._m = renderStatic;
      target._f = resolveFilter;
      target._k = checkKeyCodes;
      target._b = bindObjectProps;
      target._v = createTextVNode;
      target._e = createEmptyVNode;
      target._u = resolveScopedSlots;
      target._g = bindObjectListeners;
      target._d = bindDynamicKeys;
      target._p = prependModifier;
    }
    /*  */


    function FunctionalRenderContext(data, props, children, parent, Ctor) {
      var this$1 = this;
      var options = Ctor.options; // ensure the createElement function in functional components
      // gets a unique context - this is necessary for correct named slot check

      var contextVm;

      if (hasOwn(parent, '_uid')) {
        contextVm = Object.create(parent); // $flow-disable-line

        contextVm._original = parent;
      } else {
        // the context vm passed in is a functional context as well.
        // in this case we want to make sure we are able to get a hold to the
        // real context instance.
        contextVm = parent; // $flow-disable-line

        parent = parent._original;
      }

      var isCompiled = isTrue(options._compiled);
      var needNormalization = !isCompiled;
      this.data = data;
      this.props = props;
      this.children = children;
      this.parent = parent;
      this.listeners = data.on || emptyObject;
      this.injections = resolveInject(options.inject, parent);

      this.slots = function () {
        if (!this$1.$slots) {
          normalizeScopedSlots(data.scopedSlots, this$1.$slots = resolveSlots(children, parent));
        }

        return this$1.$slots;
      };

      Object.defineProperty(this, 'scopedSlots', {
        enumerable: true,
        get: function get() {
          return normalizeScopedSlots(data.scopedSlots, this.slots());
        }
      }); // support for compiled functional template

      if (isCompiled) {
        // exposing $options for renderStatic()
        this.$options = options; // pre-resolve slots for renderSlot()

        this.$slots = this.slots();
        this.$scopedSlots = normalizeScopedSlots(data.scopedSlots, this.$slots);
      }

      if (options._scopeId) {
        this._c = function (a, b, c, d) {
          var vnode = createElement(contextVm, a, b, c, d, needNormalization);

          if (vnode && !Array.isArray(vnode)) {
            vnode.fnScopeId = options._scopeId;
            vnode.fnContext = parent;
          }

          return vnode;
        };
      } else {
        this._c = function (a, b, c, d) {
          return createElement(contextVm, a, b, c, d, needNormalization);
        };
      }
    }

    installRenderHelpers(FunctionalRenderContext.prototype);

    function createFunctionalComponent(Ctor, propsData, data, contextVm, children) {
      var options = Ctor.options;
      var props = {};
      var propOptions = options.props;

      if (isDef(propOptions)) {
        for (var key in propOptions) {
          props[key] = validateProp(key, propOptions, propsData || emptyObject);
        }
      } else {
        if (isDef(data.attrs)) {
          mergeProps(props, data.attrs);
        }

        if (isDef(data.props)) {
          mergeProps(props, data.props);
        }
      }

      var renderContext = new FunctionalRenderContext(data, props, children, contextVm, Ctor);
      var vnode = options.render.call(null, renderContext._c, renderContext);

      if (vnode instanceof VNode) {
        return cloneAndMarkFunctionalResult(vnode, data, renderContext.parent, options, renderContext);
      } else if (Array.isArray(vnode)) {
        var vnodes = normalizeChildren(vnode) || [];
        var res = new Array(vnodes.length);

        for (var i = 0; i < vnodes.length; i++) {
          res[i] = cloneAndMarkFunctionalResult(vnodes[i], data, renderContext.parent, options, renderContext);
        }

        return res;
      }
    }

    function cloneAndMarkFunctionalResult(vnode, data, contextVm, options, renderContext) {
      // #7817 clone node before setting fnContext, otherwise if the node is reused
      // (e.g. it was from a cached normal slot) the fnContext causes named slots
      // that should not be matched to match.
      var clone = cloneVNode(vnode);
      clone.fnContext = contextVm;
      clone.fnOptions = options;
      {
        (clone.devtoolsMeta = clone.devtoolsMeta || {}).renderContext = renderContext;
      }

      if (data.slot) {
        (clone.data || (clone.data = {})).slot = data.slot;
      }

      return clone;
    }

    function mergeProps(to, from) {
      for (var key in from) {
        to[camelize(key)] = from[key];
      }
    }
    /*  */

    /*  */

    /*  */

    /*  */
    // inline hooks to be invoked on component VNodes during patch


    var componentVNodeHooks = {
      init: function init(vnode, hydrating) {
        if (vnode.componentInstance && !vnode.componentInstance._isDestroyed && vnode.data.keepAlive) {
          // kept-alive components, treat as a patch
          var mountedNode = vnode; // work around flow

          componentVNodeHooks.prepatch(mountedNode, mountedNode);
        } else {
          var child = vnode.componentInstance = createComponentInstanceForVnode(vnode, activeInstance);
          child.$mount(hydrating ? vnode.elm : undefined, hydrating);
        }
      },
      prepatch: function prepatch(oldVnode, vnode) {
        var options = vnode.componentOptions;
        var child = vnode.componentInstance = oldVnode.componentInstance;
        updateChildComponent(child, options.propsData, // updated props
        options.listeners, // updated listeners
        vnode, // new parent vnode
        options.children // new children
        );
      },
      insert: function insert(vnode) {
        var context = vnode.context;
        var componentInstance = vnode.componentInstance;

        if (!componentInstance._isMounted) {
          componentInstance._isMounted = true;
          callHook(componentInstance, 'mounted');
        }

        if (vnode.data.keepAlive) {
          if (context._isMounted) {
            // vue-router#1212
            // During updates, a kept-alive component's child components may
            // change, so directly walking the tree here may call activated hooks
            // on incorrect children. Instead we push them into a queue which will
            // be processed after the whole patch process ended.
            queueActivatedComponent(componentInstance);
          } else {
            activateChildComponent(componentInstance, true
            /* direct */
            );
          }
        }
      },
      destroy: function destroy(vnode) {
        var componentInstance = vnode.componentInstance;

        if (!componentInstance._isDestroyed) {
          if (!vnode.data.keepAlive) {
            componentInstance.$destroy();
          } else {
            deactivateChildComponent(componentInstance, true
            /* direct */
            );
          }
        }
      }
    };
    var hooksToMerge = Object.keys(componentVNodeHooks);

    function createComponent(Ctor, data, context, children, tag) {
      if (isUndef(Ctor)) {
        return;
      }

      var baseCtor = context.$options._base; // plain options object: turn it into a constructor

      if (isObject(Ctor)) {
        Ctor = baseCtor.extend(Ctor);
      } // if at this stage it's not a constructor or an async component factory,
      // reject.


      if (typeof Ctor !== 'function') {
        {
          warn("Invalid Component definition: " + String(Ctor), context);
        }
        return;
      } // async component


      var asyncFactory;

      if (isUndef(Ctor.cid)) {
        asyncFactory = Ctor;
        Ctor = resolveAsyncComponent(asyncFactory, baseCtor);

        if (Ctor === undefined) {
          // return a placeholder node for async component, which is rendered
          // as a comment node but preserves all the raw information for the node.
          // the information will be used for async server-rendering and hydration.
          return createAsyncPlaceholder(asyncFactory, data, context, children, tag);
        }
      }

      data = data || {}; // resolve constructor options in case global mixins are applied after
      // component constructor creation

      resolveConstructorOptions(Ctor); // transform component v-model data into props & events

      if (isDef(data.model)) {
        transformModel(Ctor.options, data);
      } // extract props


      var propsData = extractPropsFromVNodeData(data, Ctor, tag); // functional component

      if (isTrue(Ctor.options.functional)) {
        return createFunctionalComponent(Ctor, propsData, data, context, children);
      } // extract listeners, since these needs to be treated as
      // child component listeners instead of DOM listeners


      var listeners = data.on; // replace with listeners with .native modifier
      // so it gets processed during parent component patch.

      data.on = data.nativeOn;

      if (isTrue(Ctor.options.abstract)) {
        // abstract components do not keep anything
        // other than props & listeners & slot
        // work around flow
        var slot = data.slot;
        data = {};

        if (slot) {
          data.slot = slot;
        }
      } // install component management hooks onto the placeholder node


      installComponentHooks(data); // return a placeholder vnode

      var name = Ctor.options.name || tag;
      var vnode = new VNode("vue-component-" + Ctor.cid + (name ? "-" + name : ''), data, undefined, undefined, undefined, context, {
        Ctor: Ctor,
        propsData: propsData,
        listeners: listeners,
        tag: tag,
        children: children
      }, asyncFactory);
      return vnode;
    }

    function createComponentInstanceForVnode(vnode, // we know it's MountedComponentVNode but flow doesn't
    parent // activeInstance in lifecycle state
    ) {
      var options = {
        _isComponent: true,
        _parentVnode: vnode,
        parent: parent
      }; // check inline-template render functions

      var inlineTemplate = vnode.data.inlineTemplate;

      if (isDef(inlineTemplate)) {
        options.render = inlineTemplate.render;
        options.staticRenderFns = inlineTemplate.staticRenderFns;
      }

      return new vnode.componentOptions.Ctor(options);
    }

    function installComponentHooks(data) {
      var hooks = data.hook || (data.hook = {});

      for (var i = 0; i < hooksToMerge.length; i++) {
        var key = hooksToMerge[i];
        var existing = hooks[key];
        var toMerge = componentVNodeHooks[key];

        if (existing !== toMerge && !(existing && existing._merged)) {
          hooks[key] = existing ? mergeHook$1(toMerge, existing) : toMerge;
        }
      }
    }

    function mergeHook$1(f1, f2) {
      var merged = function merged(a, b) {
        // flow complains about extra args which is why we use any
        f1(a, b);
        f2(a, b);
      };

      merged._merged = true;
      return merged;
    } // transform component v-model info (value and callback) into
    // prop and event handler respectively.


    function transformModel(options, data) {
      var prop = options.model && options.model.prop || 'value';
      var event = options.model && options.model.event || 'input';
      (data.attrs || (data.attrs = {}))[prop] = data.model.value;
      var on = data.on || (data.on = {});
      var existing = on[event];
      var callback = data.model.callback;

      if (isDef(existing)) {
        if (Array.isArray(existing) ? existing.indexOf(callback) === -1 : existing !== callback) {
          on[event] = [callback].concat(existing);
        }
      } else {
        on[event] = callback;
      }
    }
    /*  */


    var SIMPLE_NORMALIZE = 1;
    var ALWAYS_NORMALIZE = 2; // wrapper function for providing a more flexible interface
    // without getting yelled at by flow

    function createElement(context, tag, data, children, normalizationType, alwaysNormalize) {
      if (Array.isArray(data) || isPrimitive(data)) {
        normalizationType = children;
        children = data;
        data = undefined;
      }

      if (isTrue(alwaysNormalize)) {
        normalizationType = ALWAYS_NORMALIZE;
      }

      return _createElement(context, tag, data, children, normalizationType);
    }

    function _createElement(context, tag, data, children, normalizationType) {
      if (isDef(data) && isDef(data.__ob__)) {
        warn("Avoid using observed data object as vnode data: " + JSON.stringify(data) + "\n" + 'Always create fresh vnode data objects in each render!', context);
        return createEmptyVNode();
      } // object syntax in v-bind


      if (isDef(data) && isDef(data.is)) {
        tag = data.is;
      }

      if (!tag) {
        // in case of component :is set to falsy value
        return createEmptyVNode();
      } // warn against non-primitive key


      if (isDef(data) && isDef(data.key) && !isPrimitive(data.key)) {
        {
          warn('Avoid using non-primitive value as key, ' + 'use string/number value instead.', context);
        }
      } // support single function children as default scoped slot


      if (Array.isArray(children) && typeof children[0] === 'function') {
        data = data || {};
        data.scopedSlots = {
          default: children[0]
        };
        children.length = 0;
      }

      if (normalizationType === ALWAYS_NORMALIZE) {
        children = normalizeChildren(children);
      } else if (normalizationType === SIMPLE_NORMALIZE) {
        children = simpleNormalizeChildren(children);
      }

      var vnode, ns;

      if (typeof tag === 'string') {
        var Ctor;
        ns = context.$vnode && context.$vnode.ns || config.getTagNamespace(tag);

        if (config.isReservedTag(tag)) {
          // platform built-in elements
          if (isDef(data) && isDef(data.nativeOn)) {
            warn("The .native modifier for v-on is only valid on components but it was used on <" + tag + ">.", context);
          }

          vnode = new VNode(config.parsePlatformTagName(tag), data, children, undefined, undefined, context);
        } else if ((!data || !data.pre) && isDef(Ctor = resolveAsset(context.$options, 'components', tag))) {
          // component
          vnode = createComponent(Ctor, data, context, children, tag);
        } else {
          // unknown or unlisted namespaced elements
          // check at runtime because it may get assigned a namespace when its
          // parent normalizes children
          vnode = new VNode(tag, data, children, undefined, undefined, context);
        }
      } else {
        // direct component options / constructor
        vnode = createComponent(tag, data, context, children);
      }

      if (Array.isArray(vnode)) {
        return vnode;
      } else if (isDef(vnode)) {
        if (isDef(ns)) {
          applyNS(vnode, ns);
        }

        if (isDef(data)) {
          registerDeepBindings(data);
        }

        return vnode;
      } else {
        return createEmptyVNode();
      }
    }

    function applyNS(vnode, ns, force) {
      vnode.ns = ns;

      if (vnode.tag === 'foreignObject') {
        // use default namespace inside foreignObject
        ns = undefined;
        force = true;
      }

      if (isDef(vnode.children)) {
        for (var i = 0, l = vnode.children.length; i < l; i++) {
          var child = vnode.children[i];

          if (isDef(child.tag) && (isUndef(child.ns) || isTrue(force) && child.tag !== 'svg')) {
            applyNS(child, ns, force);
          }
        }
      }
    } // ref #5318
    // necessary to ensure parent re-render when deep bindings like :style and
    // :class are used on slot nodes


    function registerDeepBindings(data) {
      if (isObject(data.style)) {
        traverse(data.style);
      }

      if (isObject(data.class)) {
        traverse(data.class);
      }
    }
    /*  */


    function initRender(vm) {
      vm._vnode = null; // the root of the child tree

      vm._staticTrees = null; // v-once cached trees

      var options = vm.$options;
      var parentVnode = vm.$vnode = options._parentVnode; // the placeholder node in parent tree

      var renderContext = parentVnode && parentVnode.context;
      vm.$slots = resolveSlots(options._renderChildren, renderContext);
      vm.$scopedSlots = emptyObject; // bind the createElement fn to this instance
      // so that we get proper render context inside it.
      // args order: tag, data, children, normalizationType, alwaysNormalize
      // internal version is used by render functions compiled from templates

      vm._c = function (a, b, c, d) {
        return createElement(vm, a, b, c, d, false);
      }; // normalization is always applied for the public version, used in
      // user-written render functions.


      vm.$createElement = function (a, b, c, d) {
        return createElement(vm, a, b, c, d, true);
      }; // $attrs & $listeners are exposed for easier HOC creation.
      // they need to be reactive so that HOCs using them are always updated


      var parentData = parentVnode && parentVnode.data;
      /* istanbul ignore else */

      {
        defineReactive$$1(vm, '$attrs', parentData && parentData.attrs || emptyObject, function () {
          !isUpdatingChildComponent && warn("$attrs is readonly.", vm);
        }, true);
        defineReactive$$1(vm, '$listeners', options._parentListeners || emptyObject, function () {
          !isUpdatingChildComponent && warn("$listeners is readonly.", vm);
        }, true);
      }
    }

    var currentRenderingInstance = null;

    function renderMixin(Vue) {
      // install runtime convenience helpers
      installRenderHelpers(Vue.prototype);

      Vue.prototype.$nextTick = function (fn) {
        return nextTick(fn, this);
      };

      Vue.prototype._render = function () {
        var vm = this;
        var ref = vm.$options;
        var render = ref.render;
        var _parentVnode = ref._parentVnode;

        if (_parentVnode) {
          vm.$scopedSlots = normalizeScopedSlots(_parentVnode.data.scopedSlots, vm.$slots, vm.$scopedSlots);
        } // set parent vnode. this allows render functions to have access
        // to the data on the placeholder node.


        vm.$vnode = _parentVnode; // render self

        var vnode;

        try {
          // There's no need to maintain a stack because all render fns are called
          // separately from one another. Nested component's render fns are called
          // when parent component is patched.
          currentRenderingInstance = vm;
          vnode = render.call(vm._renderProxy, vm.$createElement);
        } catch (e) {
          handleError(e, vm, "render"); // return error render result,
          // or previous vnode to prevent render error causing blank component

          /* istanbul ignore else */

          if (vm.$options.renderError) {
            try {
              vnode = vm.$options.renderError.call(vm._renderProxy, vm.$createElement, e);
            } catch (e) {
              handleError(e, vm, "renderError");
              vnode = vm._vnode;
            }
          } else {
            vnode = vm._vnode;
          }
        } finally {
          currentRenderingInstance = null;
        } // if the returned array contains only a single node, allow it


        if (Array.isArray(vnode) && vnode.length === 1) {
          vnode = vnode[0];
        } // return empty vnode in case the render function errored out


        if (!(vnode instanceof VNode)) {
          if (Array.isArray(vnode)) {
            warn('Multiple root nodes returned from render function. Render function ' + 'should return a single root node.', vm);
          }

          vnode = createEmptyVNode();
        } // set parent


        vnode.parent = _parentVnode;
        return vnode;
      };
    }
    /*  */


    function ensureCtor(comp, base) {
      if (comp.__esModule || hasSymbol && comp[Symbol.toStringTag] === 'Module') {
        comp = comp.default;
      }

      return isObject(comp) ? base.extend(comp) : comp;
    }

    function createAsyncPlaceholder(factory, data, context, children, tag) {
      var node = createEmptyVNode();
      node.asyncFactory = factory;
      node.asyncMeta = {
        data: data,
        context: context,
        children: children,
        tag: tag
      };
      return node;
    }

    function resolveAsyncComponent(factory, baseCtor) {
      if (isTrue(factory.error) && isDef(factory.errorComp)) {
        return factory.errorComp;
      }

      if (isDef(factory.resolved)) {
        return factory.resolved;
      }

      var owner = currentRenderingInstance;

      if (owner && isDef(factory.owners) && factory.owners.indexOf(owner) === -1) {
        // already pending
        factory.owners.push(owner);
      }

      if (isTrue(factory.loading) && isDef(factory.loadingComp)) {
        return factory.loadingComp;
      }

      if (owner && !isDef(factory.owners)) {
        var owners = factory.owners = [owner];
        var sync = true;
        var timerLoading = null;
        var timerTimeout = null;
        owner.$on('hook:destroyed', function () {
          return remove(owners, owner);
        });

        var forceRender = function forceRender(renderCompleted) {
          for (var i = 0, l = owners.length; i < l; i++) {
            owners[i].$forceUpdate();
          }

          if (renderCompleted) {
            owners.length = 0;

            if (timerLoading !== null) {
              clearTimeout(timerLoading);
              timerLoading = null;
            }

            if (timerTimeout !== null) {
              clearTimeout(timerTimeout);
              timerTimeout = null;
            }
          }
        };

        var resolve = once(function (res) {
          // cache resolved
          factory.resolved = ensureCtor(res, baseCtor); // invoke callbacks only if this is not a synchronous resolve
          // (async resolves are shimmed as synchronous during SSR)

          if (!sync) {
            forceRender(true);
          } else {
            owners.length = 0;
          }
        });
        var reject = once(function (reason) {
          warn("Failed to resolve async component: " + String(factory) + (reason ? "\nReason: " + reason : ''));

          if (isDef(factory.errorComp)) {
            factory.error = true;
            forceRender(true);
          }
        });
        var res = factory(resolve, reject);

        if (isObject(res)) {
          if (isPromise(res)) {
            // () => Promise
            if (isUndef(factory.resolved)) {
              res.then(resolve, reject);
            }
          } else if (isPromise(res.component)) {
            res.component.then(resolve, reject);

            if (isDef(res.error)) {
              factory.errorComp = ensureCtor(res.error, baseCtor);
            }

            if (isDef(res.loading)) {
              factory.loadingComp = ensureCtor(res.loading, baseCtor);

              if (res.delay === 0) {
                factory.loading = true;
              } else {
                timerLoading = setTimeout(function () {
                  timerLoading = null;

                  if (isUndef(factory.resolved) && isUndef(factory.error)) {
                    factory.loading = true;
                    forceRender(false);
                  }
                }, res.delay || 200);
              }
            }

            if (isDef(res.timeout)) {
              timerTimeout = setTimeout(function () {
                timerTimeout = null;

                if (isUndef(factory.resolved)) {
                  reject("timeout (" + res.timeout + "ms)");
                }
              }, res.timeout);
            }
          }
        }

        sync = false; // return in case resolved synchronously

        return factory.loading ? factory.loadingComp : factory.resolved;
      }
    }
    /*  */


    function isAsyncPlaceholder(node) {
      return node.isComment && node.asyncFactory;
    }
    /*  */


    function getFirstComponentChild(children) {
      if (Array.isArray(children)) {
        for (var i = 0; i < children.length; i++) {
          var c = children[i];

          if (isDef(c) && (isDef(c.componentOptions) || isAsyncPlaceholder(c))) {
            return c;
          }
        }
      }
    }
    /*  */

    /*  */


    function initEvents(vm) {
      vm._events = Object.create(null);
      vm._hasHookEvent = false; // init parent attached events

      var listeners = vm.$options._parentListeners;

      if (listeners) {
        updateComponentListeners(vm, listeners);
      }
    }

    var target;

    function add(event, fn) {
      target.$on(event, fn);
    }

    function remove$1(event, fn) {
      target.$off(event, fn);
    }

    function createOnceHandler(event, fn) {
      var _target = target;
      return function onceHandler() {
        var res = fn.apply(null, arguments);

        if (res !== null) {
          _target.$off(event, onceHandler);
        }
      };
    }

    function updateComponentListeners(vm, listeners, oldListeners) {
      target = vm;
      updateListeners(listeners, oldListeners || {}, add, remove$1, createOnceHandler, vm);
      target = undefined;
    }

    function eventsMixin(Vue) {
      var hookRE = /^hook:/;

      Vue.prototype.$on = function (event, fn) {
        var vm = this;

        if (Array.isArray(event)) {
          for (var i = 0, l = event.length; i < l; i++) {
            vm.$on(event[i], fn);
          }
        } else {
          (vm._events[event] || (vm._events[event] = [])).push(fn); // optimize hook:event cost by using a boolean flag marked at registration
          // instead of a hash lookup

          if (hookRE.test(event)) {
            vm._hasHookEvent = true;
          }
        }

        return vm;
      };

      Vue.prototype.$once = function (event, fn) {
        var vm = this;

        function on() {
          vm.$off(event, on);
          fn.apply(vm, arguments);
        }

        on.fn = fn;
        vm.$on(event, on);
        return vm;
      };

      Vue.prototype.$off = function (event, fn) {
        var vm = this; // all

        if (!arguments.length) {
          vm._events = Object.create(null);
          return vm;
        } // array of events


        if (Array.isArray(event)) {
          for (var i$1 = 0, l = event.length; i$1 < l; i$1++) {
            vm.$off(event[i$1], fn);
          }

          return vm;
        } // specific event


        var cbs = vm._events[event];

        if (!cbs) {
          return vm;
        }

        if (!fn) {
          vm._events[event] = null;
          return vm;
        } // specific handler


        var cb;
        var i = cbs.length;

        while (i--) {
          cb = cbs[i];

          if (cb === fn || cb.fn === fn) {
            cbs.splice(i, 1);
            break;
          }
        }

        return vm;
      };

      Vue.prototype.$emit = function (event) {
        var vm = this;
        {
          var lowerCaseEvent = event.toLowerCase();

          if (lowerCaseEvent !== event && vm._events[lowerCaseEvent]) {
            tip("Event \"" + lowerCaseEvent + "\" is emitted in component " + formatComponentName(vm) + " but the handler is registered for \"" + event + "\". " + "Note that HTML attributes are case-insensitive and you cannot use " + "v-on to listen to camelCase events when using in-DOM templates. " + "You should probably use \"" + hyphenate(event) + "\" instead of \"" + event + "\".");
          }
        }
        var cbs = vm._events[event];

        if (cbs) {
          cbs = cbs.length > 1 ? toArray(cbs) : cbs;
          var args = toArray(arguments, 1);
          var info = "event handler for \"" + event + "\"";

          for (var i = 0, l = cbs.length; i < l; i++) {
            invokeWithErrorHandling(cbs[i], vm, args, vm, info);
          }
        }

        return vm;
      };
    }
    /*  */


    var activeInstance = null;
    var isUpdatingChildComponent = false;

    function setActiveInstance(vm) {
      var prevActiveInstance = activeInstance;
      activeInstance = vm;
      return function () {
        activeInstance = prevActiveInstance;
      };
    }

    function initLifecycle(vm) {
      var options = vm.$options; // locate first non-abstract parent

      var parent = options.parent;

      if (parent && !options.abstract) {
        while (parent.$options.abstract && parent.$parent) {
          parent = parent.$parent;
        }

        parent.$children.push(vm);
      }

      vm.$parent = parent;
      vm.$root = parent ? parent.$root : vm;
      vm.$children = [];
      vm.$refs = {};
      vm._watcher = null;
      vm._inactive = null;
      vm._directInactive = false;
      vm._isMounted = false;
      vm._isDestroyed = false;
      vm._isBeingDestroyed = false;
    }

    function lifecycleMixin(Vue) {
      Vue.prototype._update = function (vnode, hydrating) {
        var vm = this;
        var prevEl = vm.$el;
        var prevVnode = vm._vnode;
        var restoreActiveInstance = setActiveInstance(vm);
        vm._vnode = vnode; // Vue.prototype.__patch__ is injected in entry points
        // based on the rendering backend used.

        if (!prevVnode) {
          // initial render
          vm.$el = vm.__patch__(vm.$el, vnode, hydrating, false
          /* removeOnly */
          );
        } else {
          // updates
          vm.$el = vm.__patch__(prevVnode, vnode);
        }

        restoreActiveInstance(); // update __vue__ reference

        if (prevEl) {
          prevEl.__vue__ = null;
        }

        if (vm.$el) {
          vm.$el.__vue__ = vm;
        } // if parent is an HOC, update its $el as well


        if (vm.$vnode && vm.$parent && vm.$vnode === vm.$parent._vnode) {
          vm.$parent.$el = vm.$el;
        } // updated hook is called by the scheduler to ensure that children are
        // updated in a parent's updated hook.

      };

      Vue.prototype.$forceUpdate = function () {
        var vm = this;

        if (vm._watcher) {
          vm._watcher.update();
        }
      };

      Vue.prototype.$destroy = function () {
        var vm = this;

        if (vm._isBeingDestroyed) {
          return;
        }

        callHook(vm, 'beforeDestroy');
        vm._isBeingDestroyed = true; // remove self from parent

        var parent = vm.$parent;

        if (parent && !parent._isBeingDestroyed && !vm.$options.abstract) {
          remove(parent.$children, vm);
        } // teardown watchers


        if (vm._watcher) {
          vm._watcher.teardown();
        }

        var i = vm._watchers.length;

        while (i--) {
          vm._watchers[i].teardown();
        } // remove reference from data ob
        // frozen object may not have observer.


        if (vm._data.__ob__) {
          vm._data.__ob__.vmCount--;
        } // call the last hook...


        vm._isDestroyed = true; // invoke destroy hooks on current rendered tree

        vm.__patch__(vm._vnode, null); // fire destroyed hook


        callHook(vm, 'destroyed'); // turn off all instance listeners.

        vm.$off(); // remove __vue__ reference

        if (vm.$el) {
          vm.$el.__vue__ = null;
        } // release circular reference (#6759)


        if (vm.$vnode) {
          vm.$vnode.parent = null;
        }
      };
    }

    function mountComponent(vm, el, hydrating) {
      vm.$el = el;

      if (!vm.$options.render) {
        vm.$options.render = createEmptyVNode;
        {
          /* istanbul ignore if */
          if (vm.$options.template && vm.$options.template.charAt(0) !== '#' || vm.$options.el || el) {
            warn('You are using the runtime-only build of Vue where the template ' + 'compiler is not available. Either pre-compile the templates into ' + 'render functions, or use the compiler-included build.', vm);
          } else {
            warn('Failed to mount component: template or render function not defined.', vm);
          }
        }
      }

      callHook(vm, 'beforeMount');
      var updateComponent;
      /* istanbul ignore if */

      if (config.performance && mark) {
        updateComponent = function updateComponent() {
          var name = vm._name;
          var id = vm._uid;
          var startTag = "vue-perf-start:" + id;
          var endTag = "vue-perf-end:" + id;
          mark(startTag);

          var vnode = vm._render();

          mark(endTag);
          measure("vue " + name + " render", startTag, endTag);
          mark(startTag);

          vm._update(vnode, hydrating);

          mark(endTag);
          measure("vue " + name + " patch", startTag, endTag);
        };
      } else {
        updateComponent = function updateComponent() {
          vm._update(vm._render(), hydrating);
        };
      } // we set this to vm._watcher inside the watcher's constructor
      // since the watcher's initial patch may call $forceUpdate (e.g. inside child
      // component's mounted hook), which relies on vm._watcher being already defined


      new Watcher(vm, updateComponent, noop, {
        before: function before() {
          if (vm._isMounted && !vm._isDestroyed) {
            callHook(vm, 'beforeUpdate');
          }
        }
      }, true
      /* isRenderWatcher */
      );
      hydrating = false; // manually mounted instance, call mounted on self
      // mounted is called for render-created child components in its inserted hook

      if (vm.$vnode == null) {
        vm._isMounted = true;
        callHook(vm, 'mounted');
      }

      return vm;
    }

    function updateChildComponent(vm, propsData, listeners, parentVnode, renderChildren) {
      {
        isUpdatingChildComponent = true;
      } // determine whether component has slot children
      // we need to do this before overwriting $options._renderChildren.
      // check if there are dynamic scopedSlots (hand-written or compiled but with
      // dynamic slot names). Static scoped slots compiled from template has the
      // "$stable" marker.

      var newScopedSlots = parentVnode.data.scopedSlots;
      var oldScopedSlots = vm.$scopedSlots;
      var hasDynamicScopedSlot = !!(newScopedSlots && !newScopedSlots.$stable || oldScopedSlots !== emptyObject && !oldScopedSlots.$stable || newScopedSlots && vm.$scopedSlots.$key !== newScopedSlots.$key); // Any static slot children from the parent may have changed during parent's
      // update. Dynamic scoped slots may also have changed. In such cases, a forced
      // update is necessary to ensure correctness.

      var needsForceUpdate = !!(renderChildren || // has new static slots
      vm.$options._renderChildren || // has old static slots
      hasDynamicScopedSlot);
      vm.$options._parentVnode = parentVnode;
      vm.$vnode = parentVnode; // update vm's placeholder node without re-render

      if (vm._vnode) {
        // update child tree's parent
        vm._vnode.parent = parentVnode;
      }

      vm.$options._renderChildren = renderChildren; // update $attrs and $listeners hash
      // these are also reactive so they may trigger child update if the child
      // used them during render

      vm.$attrs = parentVnode.data.attrs || emptyObject;
      vm.$listeners = listeners || emptyObject; // update props

      if (propsData && vm.$options.props) {
        toggleObserving(false);
        var props = vm._props;
        var propKeys = vm.$options._propKeys || [];

        for (var i = 0; i < propKeys.length; i++) {
          var key = propKeys[i];
          var propOptions = vm.$options.props; // wtf flow?

          props[key] = validateProp(key, propOptions, propsData, vm);
        }

        toggleObserving(true); // keep a copy of raw propsData

        vm.$options.propsData = propsData;
      } // update listeners


      listeners = listeners || emptyObject;
      var oldListeners = vm.$options._parentListeners;
      vm.$options._parentListeners = listeners;
      updateComponentListeners(vm, listeners, oldListeners); // resolve slots + force update if has children

      if (needsForceUpdate) {
        vm.$slots = resolveSlots(renderChildren, parentVnode.context);
        vm.$forceUpdate();
      }

      {
        isUpdatingChildComponent = false;
      }
    }

    function isInInactiveTree(vm) {
      while (vm && (vm = vm.$parent)) {
        if (vm._inactive) {
          return true;
        }
      }

      return false;
    }

    function activateChildComponent(vm, direct) {
      if (direct) {
        vm._directInactive = false;

        if (isInInactiveTree(vm)) {
          return;
        }
      } else if (vm._directInactive) {
        return;
      }

      if (vm._inactive || vm._inactive === null) {
        vm._inactive = false;

        for (var i = 0; i < vm.$children.length; i++) {
          activateChildComponent(vm.$children[i]);
        }

        callHook(vm, 'activated');
      }
    }

    function deactivateChildComponent(vm, direct) {
      if (direct) {
        vm._directInactive = true;

        if (isInInactiveTree(vm)) {
          return;
        }
      }

      if (!vm._inactive) {
        vm._inactive = true;

        for (var i = 0; i < vm.$children.length; i++) {
          deactivateChildComponent(vm.$children[i]);
        }

        callHook(vm, 'deactivated');
      }
    }

    function callHook(vm, hook) {
      // #7573 disable dep collection when invoking lifecycle hooks
      pushTarget();
      var handlers = vm.$options[hook];
      var info = hook + " hook";

      if (handlers) {
        for (var i = 0, j = handlers.length; i < j; i++) {
          invokeWithErrorHandling(handlers[i], vm, null, vm, info);
        }
      }

      if (vm._hasHookEvent) {
        vm.$emit('hook:' + hook);
      }

      popTarget();
    }
    /*  */


    var MAX_UPDATE_COUNT = 100;
    var queue = [];
    var activatedChildren = [];
    var has = {};
    var circular = {};
    var waiting = false;
    var flushing = false;
    var index = 0;
    /**
     * Reset the scheduler's state.
     */

    function resetSchedulerState() {
      index = queue.length = activatedChildren.length = 0;
      has = {};
      {
        circular = {};
      }
      waiting = flushing = false;
    } // Async edge case #6566 requires saving the timestamp when event listeners are
    // attached. However, calling performance.now() has a perf overhead especially
    // if the page has thousands of event listeners. Instead, we take a timestamp
    // every time the scheduler flushes and use that for all event listeners
    // attached during that flush.


    var currentFlushTimestamp = 0; // Async edge case fix requires storing an event listener's attach timestamp.

    var getNow = Date.now; // Determine what event timestamp the browser is using. Annoyingly, the
    // timestamp can either be hi-res (relative to page load) or low-res
    // (relative to UNIX epoch), so in order to compare time we have to use the
    // same timestamp type when saving the flush timestamp.
    // All IE versions use low-res event timestamps, and have problematic clock
    // implementations (#9632)

    if (inBrowser && !isIE) {
      var performance = window.performance;

      if (performance && typeof performance.now === 'function' && getNow() > document.createEvent('Event').timeStamp) {
        // if the event timestamp, although evaluated AFTER the Date.now(), is
        // smaller than it, it means the event is using a hi-res timestamp,
        // and we need to use the hi-res version for event listener timestamps as
        // well.
        getNow = function getNow() {
          return performance.now();
        };
      }
    }
    /**
     * Flush both queues and run the watchers.
     */


    function flushSchedulerQueue() {
      currentFlushTimestamp = getNow();
      flushing = true;
      var watcher, id; // Sort queue before flush.
      // This ensures that:
      // 1. Components are updated from parent to child. (because parent is always
      //    created before the child)
      // 2. A component's user watchers are run before its render watcher (because
      //    user watchers are created before the render watcher)
      // 3. If a component is destroyed during a parent component's watcher run,
      //    its watchers can be skipped.

      queue.sort(function (a, b) {
        return a.id - b.id;
      }); // do not cache length because more watchers might be pushed
      // as we run existing watchers

      for (index = 0; index < queue.length; index++) {
        watcher = queue[index];

        if (watcher.before) {
          watcher.before();
        }

        id = watcher.id;
        has[id] = null;
        watcher.run(); // in dev build, check and stop circular updates.

        if (has[id] != null) {
          circular[id] = (circular[id] || 0) + 1;

          if (circular[id] > MAX_UPDATE_COUNT) {
            warn('You may have an infinite update loop ' + (watcher.user ? "in watcher with expression \"" + watcher.expression + "\"" : "in a component render function."), watcher.vm);
            break;
          }
        }
      } // keep copies of post queues before resetting state


      var activatedQueue = activatedChildren.slice();
      var updatedQueue = queue.slice();
      resetSchedulerState(); // call component updated and activated hooks

      callActivatedHooks(activatedQueue);
      callUpdatedHooks(updatedQueue); // devtool hook

      /* istanbul ignore if */

      if (devtools && config.devtools) {
        devtools.emit('flush');
      }
    }

    function callUpdatedHooks(queue) {
      var i = queue.length;

      while (i--) {
        var watcher = queue[i];
        var vm = watcher.vm;

        if (vm._watcher === watcher && vm._isMounted && !vm._isDestroyed) {
          callHook(vm, 'updated');
        }
      }
    }
    /**
     * Queue a kept-alive component that was activated during patch.
     * The queue will be processed after the entire tree has been patched.
     */


    function queueActivatedComponent(vm) {
      // setting _inactive to false here so that a render function can
      // rely on checking whether it's in an inactive tree (e.g. router-view)
      vm._inactive = false;
      activatedChildren.push(vm);
    }

    function callActivatedHooks(queue) {
      for (var i = 0; i < queue.length; i++) {
        queue[i]._inactive = true;
        activateChildComponent(queue[i], true
        /* true */
        );
      }
    }
    /**
     * Push a watcher into the watcher queue.
     * Jobs with duplicate IDs will be skipped unless it's
     * pushed when the queue is being flushed.
     */


    function queueWatcher(watcher) {
      var id = watcher.id;

      if (has[id] == null) {
        has[id] = true;

        if (!flushing) {
          queue.push(watcher);
        } else {
          // if already flushing, splice the watcher based on its id
          // if already past its id, it will be run next immediately.
          var i = queue.length - 1;

          while (i > index && queue[i].id > watcher.id) {
            i--;
          }

          queue.splice(i + 1, 0, watcher);
        } // queue the flush


        if (!waiting) {
          waiting = true;

          if (!config.async) {
            flushSchedulerQueue();
            return;
          }

          nextTick(flushSchedulerQueue);
        }
      }
    }
    /*  */


    var uid$2 = 0;
    /**
     * A watcher parses an expression, collects dependencies,
     * and fires callback when the expression value changes.
     * This is used for both the $watch() api and directives.
     */

    var Watcher = function Watcher(vm, expOrFn, cb, options, isRenderWatcher) {
      this.vm = vm;

      if (isRenderWatcher) {
        vm._watcher = this;
      }

      vm._watchers.push(this); // options


      if (options) {
        this.deep = !!options.deep;
        this.user = !!options.user;
        this.lazy = !!options.lazy;
        this.sync = !!options.sync;
        this.before = options.before;
      } else {
        this.deep = this.user = this.lazy = this.sync = false;
      }

      this.cb = cb;
      this.id = ++uid$2; // uid for batching

      this.active = true;
      this.dirty = this.lazy; // for lazy watchers

      this.deps = [];
      this.newDeps = [];
      this.depIds = new _Set();
      this.newDepIds = new _Set();
      this.expression = expOrFn.toString(); // parse expression for getter

      if (typeof expOrFn === 'function') {
        this.getter = expOrFn;
      } else {
        this.getter = parsePath(expOrFn);

        if (!this.getter) {
          this.getter = noop;
          warn("Failed watching path: \"" + expOrFn + "\" " + 'Watcher only accepts simple dot-delimited paths. ' + 'For full control, use a function instead.', vm);
        }
      }

      this.value = this.lazy ? undefined : this.get();
    };
    /**
     * Evaluate the getter, and re-collect dependencies.
     */


    Watcher.prototype.get = function get() {
      pushTarget(this);
      var value;
      var vm = this.vm;

      try {
        value = this.getter.call(vm, vm);
      } catch (e) {
        if (this.user) {
          handleError(e, vm, "getter for watcher \"" + this.expression + "\"");
        } else {
          throw e;
        }
      } finally {
        // "touch" every property so they are all tracked as
        // dependencies for deep watching
        if (this.deep) {
          traverse(value);
        }

        popTarget();
        this.cleanupDeps();
      }

      return value;
    };
    /**
     * Add a dependency to this directive.
     */


    Watcher.prototype.addDep = function addDep(dep) {
      var id = dep.id;

      if (!this.newDepIds.has(id)) {
        this.newDepIds.add(id);
        this.newDeps.push(dep);

        if (!this.depIds.has(id)) {
          dep.addSub(this);
        }
      }
    };
    /**
     * Clean up for dependency collection.
     */


    Watcher.prototype.cleanupDeps = function cleanupDeps() {
      var i = this.deps.length;

      while (i--) {
        var dep = this.deps[i];

        if (!this.newDepIds.has(dep.id)) {
          dep.removeSub(this);
        }
      }

      var tmp = this.depIds;
      this.depIds = this.newDepIds;
      this.newDepIds = tmp;
      this.newDepIds.clear();
      tmp = this.deps;
      this.deps = this.newDeps;
      this.newDeps = tmp;
      this.newDeps.length = 0;
    };
    /**
     * Subscriber interface.
     * Will be called when a dependency changes.
     */


    Watcher.prototype.update = function update() {
      /* istanbul ignore else */
      if (this.lazy) {
        this.dirty = true;
      } else if (this.sync) {
        this.run();
      } else {
        queueWatcher(this);
      }
    };
    /**
     * Scheduler job interface.
     * Will be called by the scheduler.
     */


    Watcher.prototype.run = function run() {
      if (this.active) {
        var value = this.get();

        if (value !== this.value || // Deep watchers and watchers on Object/Arrays should fire even
        // when the value is the same, because the value may
        // have mutated.
        isObject(value) || this.deep) {
          // set new value
          var oldValue = this.value;
          this.value = value;

          if (this.user) {
            try {
              this.cb.call(this.vm, value, oldValue);
            } catch (e) {
              handleError(e, this.vm, "callback for watcher \"" + this.expression + "\"");
            }
          } else {
            this.cb.call(this.vm, value, oldValue);
          }
        }
      }
    };
    /**
     * Evaluate the value of the watcher.
     * This only gets called for lazy watchers.
     */


    Watcher.prototype.evaluate = function evaluate() {
      this.value = this.get();
      this.dirty = false;
    };
    /**
     * Depend on all deps collected by this watcher.
     */


    Watcher.prototype.depend = function depend() {
      var i = this.deps.length;

      while (i--) {
        this.deps[i].depend();
      }
    };
    /**
     * Remove self from all dependencies' subscriber list.
     */


    Watcher.prototype.teardown = function teardown() {
      if (this.active) {
        // remove self from vm's watcher list
        // this is a somewhat expensive operation so we skip it
        // if the vm is being destroyed.
        if (!this.vm._isBeingDestroyed) {
          remove(this.vm._watchers, this);
        }

        var i = this.deps.length;

        while (i--) {
          this.deps[i].removeSub(this);
        }

        this.active = false;
      }
    };
    /*  */


    var sharedPropertyDefinition = {
      enumerable: true,
      configurable: true,
      get: noop,
      set: noop
    };

    function proxy(target, sourceKey, key) {
      sharedPropertyDefinition.get = function proxyGetter() {
        return this[sourceKey][key];
      };

      sharedPropertyDefinition.set = function proxySetter(val) {
        this[sourceKey][key] = val;
      };

      Object.defineProperty(target, key, sharedPropertyDefinition);
    }

    function initState(vm) {
      vm._watchers = [];
      var opts = vm.$options;

      if (opts.props) {
        initProps(vm, opts.props);
      }

      if (opts.methods) {
        initMethods(vm, opts.methods);
      }

      if (opts.data) {
        initData(vm);
      } else {
        observe(vm._data = {}, true
        /* asRootData */
        );
      }

      if (opts.computed) {
        initComputed(vm, opts.computed);
      }

      if (opts.watch && opts.watch !== nativeWatch) {
        initWatch(vm, opts.watch);
      }
    }

    function initProps(vm, propsOptions) {
      var propsData = vm.$options.propsData || {};
      var props = vm._props = {}; // cache prop keys so that future props updates can iterate using Array
      // instead of dynamic object key enumeration.

      var keys = vm.$options._propKeys = [];
      var isRoot = !vm.$parent; // root instance props should be converted

      if (!isRoot) {
        toggleObserving(false);
      }

      var loop = function loop(key) {
        keys.push(key);
        var value = validateProp(key, propsOptions, propsData, vm);
        /* istanbul ignore else */

        {
          var hyphenatedKey = hyphenate(key);

          if (isReservedAttribute(hyphenatedKey) || config.isReservedAttr(hyphenatedKey)) {
            warn("\"" + hyphenatedKey + "\" is a reserved attribute and cannot be used as component prop.", vm);
          }

          defineReactive$$1(props, key, value, function () {
            if (!isRoot && !isUpdatingChildComponent) {
              warn("Avoid mutating a prop directly since the value will be " + "overwritten whenever the parent component re-renders. " + "Instead, use a data or computed property based on the prop's " + "value. Prop being mutated: \"" + key + "\"", vm);
            }
          });
        } // static props are already proxied on the component's prototype
        // during Vue.extend(). We only need to proxy props defined at
        // instantiation here.

        if (!(key in vm)) {
          proxy(vm, "_props", key);
        }
      };

      for (var key in propsOptions) {
        loop(key);
      }

      toggleObserving(true);
    }

    function initData(vm) {
      var data = vm.$options.data;
      data = vm._data = typeof data === 'function' ? getData(data, vm) : data || {};

      if (!isPlainObject(data)) {
        data = {};
        warn('data functions should return an object:\n' + 'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function', vm);
      } // proxy data on instance


      var keys = Object.keys(data);
      var props = vm.$options.props;
      var methods = vm.$options.methods;
      var i = keys.length;

      while (i--) {
        var key = keys[i];
        {
          if (methods && hasOwn(methods, key)) {
            warn("Method \"" + key + "\" has already been defined as a data property.", vm);
          }
        }

        if (props && hasOwn(props, key)) {
          warn("The data property \"" + key + "\" is already declared as a prop. " + "Use prop default value instead.", vm);
        } else if (!isReserved(key)) {
          proxy(vm, "_data", key);
        }
      } // observe data


      observe(data, true
      /* asRootData */
      );
    }

    function getData(data, vm) {
      // #7573 disable dep collection when invoking data getters
      pushTarget();

      try {
        return data.call(vm, vm);
      } catch (e) {
        handleError(e, vm, "data()");
        return {};
      } finally {
        popTarget();
      }
    }

    var computedWatcherOptions = {
      lazy: true
    };

    function initComputed(vm, computed) {
      // $flow-disable-line
      var watchers = vm._computedWatchers = Object.create(null); // computed properties are just getters during SSR

      var isSSR = isServerRendering();

      for (var key in computed) {
        var userDef = computed[key];
        var getter = typeof userDef === 'function' ? userDef : userDef.get;

        if (getter == null) {
          warn("Getter is missing for computed property \"" + key + "\".", vm);
        }

        if (!isSSR) {
          // create internal watcher for the computed property.
          watchers[key] = new Watcher(vm, getter || noop, noop, computedWatcherOptions);
        } // component-defined computed properties are already defined on the
        // component prototype. We only need to define computed properties defined
        // at instantiation here.


        if (!(key in vm)) {
          defineComputed(vm, key, userDef);
        } else {
          if (key in vm.$data) {
            warn("The computed property \"" + key + "\" is already defined in data.", vm);
          } else if (vm.$options.props && key in vm.$options.props) {
            warn("The computed property \"" + key + "\" is already defined as a prop.", vm);
          }
        }
      }
    }

    function defineComputed(target, key, userDef) {
      var shouldCache = !isServerRendering();

      if (typeof userDef === 'function') {
        sharedPropertyDefinition.get = shouldCache ? createComputedGetter(key) : createGetterInvoker(userDef);
        sharedPropertyDefinition.set = noop;
      } else {
        sharedPropertyDefinition.get = userDef.get ? shouldCache && userDef.cache !== false ? createComputedGetter(key) : createGetterInvoker(userDef.get) : noop;
        sharedPropertyDefinition.set = userDef.set || noop;
      }

      if (sharedPropertyDefinition.set === noop) {
        sharedPropertyDefinition.set = function () {
          warn("Computed property \"" + key + "\" was assigned to but it has no setter.", this);
        };
      }

      Object.defineProperty(target, key, sharedPropertyDefinition);
    }

    function createComputedGetter(key) {
      return function computedGetter() {
        var watcher = this._computedWatchers && this._computedWatchers[key];

        if (watcher) {
          if (watcher.dirty) {
            watcher.evaluate();
          }

          if (Dep.target) {
            watcher.depend();
          }

          return watcher.value;
        }
      };
    }

    function createGetterInvoker(fn) {
      return function computedGetter() {
        return fn.call(this, this);
      };
    }

    function initMethods(vm, methods) {
      var props = vm.$options.props;

      for (var key in methods) {
        {
          if (typeof methods[key] !== 'function') {
            warn("Method \"" + key + "\" has type \"" + babelHelpers.typeof(methods[key]) + "\" in the component definition. " + "Did you reference the function correctly?", vm);
          }

          if (props && hasOwn(props, key)) {
            warn("Method \"" + key + "\" has already been defined as a prop.", vm);
          }

          if (key in vm && isReserved(key)) {
            warn("Method \"" + key + "\" conflicts with an existing Vue instance method. " + "Avoid defining component methods that start with _ or $.");
          }
        }
        vm[key] = typeof methods[key] !== 'function' ? noop : bind(methods[key], vm);
      }
    }

    function initWatch(vm, watch) {
      for (var key in watch) {
        var handler = watch[key];

        if (Array.isArray(handler)) {
          for (var i = 0; i < handler.length; i++) {
            createWatcher(vm, key, handler[i]);
          }
        } else {
          createWatcher(vm, key, handler);
        }
      }
    }

    function createWatcher(vm, expOrFn, handler, options) {
      if (isPlainObject(handler)) {
        options = handler;
        handler = handler.handler;
      }

      if (typeof handler === 'string') {
        handler = vm[handler];
      }

      return vm.$watch(expOrFn, handler, options);
    }

    function stateMixin(Vue) {
      // flow somehow has problems with directly declared definition object
      // when using Object.defineProperty, so we have to procedurally build up
      // the object here.
      var dataDef = {};

      dataDef.get = function () {
        return this._data;
      };

      var propsDef = {};

      propsDef.get = function () {
        return this._props;
      };

      {
        dataDef.set = function () {
          warn('Avoid replacing instance root $data. ' + 'Use nested data properties instead.', this);
        };

        propsDef.set = function () {
          warn("$props is readonly.", this);
        };
      }
      Object.defineProperty(Vue.prototype, '$data', dataDef);
      Object.defineProperty(Vue.prototype, '$props', propsDef);
      Vue.prototype.$set = set;
      Vue.prototype.$delete = del;

      Vue.prototype.$watch = function (expOrFn, cb, options) {
        var vm = this;

        if (isPlainObject(cb)) {
          return createWatcher(vm, expOrFn, cb, options);
        }

        options = options || {};
        options.user = true;
        var watcher = new Watcher(vm, expOrFn, cb, options);

        if (options.immediate) {
          try {
            cb.call(vm, watcher.value);
          } catch (error) {
            handleError(error, vm, "callback for immediate watcher \"" + watcher.expression + "\"");
          }
        }

        return function unwatchFn() {
          watcher.teardown();
        };
      };
    }
    /*  */


    var uid$3 = 0;

    function initMixin(Vue) {
      Vue.prototype._init = function (options) {
        var vm = this; // a uid

        vm._uid = uid$3++;
        var startTag, endTag;
        /* istanbul ignore if */

        if (config.performance && mark) {
          startTag = "vue-perf-start:" + vm._uid;
          endTag = "vue-perf-end:" + vm._uid;
          mark(startTag);
        } // a flag to avoid this being observed


        vm._isVue = true; // merge options

        if (options && options._isComponent) {
          // optimize internal component instantiation
          // since dynamic options merging is pretty slow, and none of the
          // internal component options needs special treatment.
          initInternalComponent(vm, options);
        } else {
          vm.$options = mergeOptions(resolveConstructorOptions(vm.constructor), options || {}, vm);
        }
        /* istanbul ignore else */


        {
          initProxy(vm);
        } // expose real self

        vm._self = vm;
        initLifecycle(vm);
        initEvents(vm);
        initRender(vm);
        callHook(vm, 'beforeCreate');
        initInjections(vm); // resolve injections before data/props

        initState(vm);
        initProvide(vm); // resolve provide after data/props

        callHook(vm, 'created');
        /* istanbul ignore if */

        if (config.performance && mark) {
          vm._name = formatComponentName(vm, false);
          mark(endTag);
          measure("vue " + vm._name + " init", startTag, endTag);
        }

        if (vm.$options.el) {
          vm.$mount(vm.$options.el);
        }
      };
    }

    function initInternalComponent(vm, options) {
      var opts = vm.$options = Object.create(vm.constructor.options); // doing this because it's faster than dynamic enumeration.

      var parentVnode = options._parentVnode;
      opts.parent = options.parent;
      opts._parentVnode = parentVnode;
      var vnodeComponentOptions = parentVnode.componentOptions;
      opts.propsData = vnodeComponentOptions.propsData;
      opts._parentListeners = vnodeComponentOptions.listeners;
      opts._renderChildren = vnodeComponentOptions.children;
      opts._componentTag = vnodeComponentOptions.tag;

      if (options.render) {
        opts.render = options.render;
        opts.staticRenderFns = options.staticRenderFns;
      }
    }

    function resolveConstructorOptions(Ctor) {
      var options = Ctor.options;

      if (Ctor.super) {
        var superOptions = resolveConstructorOptions(Ctor.super);
        var cachedSuperOptions = Ctor.superOptions;

        if (superOptions !== cachedSuperOptions) {
          // super option changed,
          // need to resolve new options.
          Ctor.superOptions = superOptions; // check if there are any late-modified/attached options (#4976)

          var modifiedOptions = resolveModifiedOptions(Ctor); // update base extend options

          if (modifiedOptions) {
            extend(Ctor.extendOptions, modifiedOptions);
          }

          options = Ctor.options = mergeOptions(superOptions, Ctor.extendOptions);

          if (options.name) {
            options.components[options.name] = Ctor;
          }
        }
      }

      return options;
    }

    function resolveModifiedOptions(Ctor) {
      var modified;
      var latest = Ctor.options;
      var sealed = Ctor.sealedOptions;

      for (var key in latest) {
        if (latest[key] !== sealed[key]) {
          if (!modified) {
            modified = {};
          }

          modified[key] = latest[key];
        }
      }

      return modified;
    }

    function Vue(options) {
      if (!(this instanceof Vue)) {
        warn('Vue is a constructor and should be called with the `new` keyword');
      }

      this._init(options);
    }

    initMixin(Vue);
    stateMixin(Vue);
    eventsMixin(Vue);
    lifecycleMixin(Vue);
    renderMixin(Vue);
    /*  */

    function initUse(Vue) {
      Vue.use = function (plugin) {
        var installedPlugins = this._installedPlugins || (this._installedPlugins = []);

        if (installedPlugins.indexOf(plugin) > -1) {
          return this;
        } // additional parameters


        var args = toArray(arguments, 1);
        args.unshift(this);

        if (typeof plugin.install === 'function') {
          plugin.install.apply(plugin, args);
        } else if (typeof plugin === 'function') {
          plugin.apply(null, args);
        }

        installedPlugins.push(plugin);
        return this;
      };
    }
    /*  */


    function initMixin$1(Vue) {
      Vue.mixin = function (mixin) {
        this.options = mergeOptions(this.options, mixin);
        return this;
      };
    }
    /*  */


    function initExtend(Vue) {
      /**
       * Each instance constructor, including Vue, has a unique
       * cid. This enables us to create wrapped "child
       * constructors" for prototypal inheritance and cache them.
       */
      Vue.cid = 0;
      var cid = 1;
      /**
       * Class inheritance
       */

      Vue.extend = function (extendOptions) {
        extendOptions = extendOptions || {};
        var Super = this;
        var SuperId = Super.cid;
        var cachedCtors = extendOptions._Ctor || (extendOptions._Ctor = {});

        if (cachedCtors[SuperId]) {
          return cachedCtors[SuperId];
        }

        var name = extendOptions.name || Super.options.name;

        if (name) {
          validateComponentName(name);
        }

        var Sub = function VueComponent(options) {
          this._init(options);
        };

        Sub.prototype = Object.create(Super.prototype);
        Sub.prototype.constructor = Sub;
        Sub.cid = cid++;
        Sub.options = mergeOptions(Super.options, extendOptions);
        Sub['super'] = Super; // For props and computed properties, we define the proxy getters on
        // the Vue instances at extension time, on the extended prototype. This
        // avoids Object.defineProperty calls for each instance created.

        if (Sub.options.props) {
          initProps$1(Sub);
        }

        if (Sub.options.computed) {
          initComputed$1(Sub);
        } // allow further extension/mixin/plugin usage


        Sub.extend = Super.extend;
        Sub.mixin = Super.mixin;
        Sub.use = Super.use; // create asset registers, so extended classes
        // can have their private assets too.

        ASSET_TYPES.forEach(function (type) {
          Sub[type] = Super[type];
        }); // enable recursive self-lookup

        if (name) {
          Sub.options.components[name] = Sub;
        } // keep a reference to the super options at extension time.
        // later at instantiation we can check if Super's options have
        // been updated.


        Sub.superOptions = Super.options;
        Sub.extendOptions = extendOptions;
        Sub.sealedOptions = extend({}, Sub.options); // cache constructor

        cachedCtors[SuperId] = Sub;
        return Sub;
      };
    }

    function initProps$1(Comp) {
      var props = Comp.options.props;

      for (var key in props) {
        proxy(Comp.prototype, "_props", key);
      }
    }

    function initComputed$1(Comp) {
      var computed = Comp.options.computed;

      for (var key in computed) {
        defineComputed(Comp.prototype, key, computed[key]);
      }
    }
    /*  */


    function initAssetRegisters(Vue) {
      /**
       * Create asset registration methods.
       */
      ASSET_TYPES.forEach(function (type) {
        Vue[type] = function (id, definition) {
          if (!definition) {
            return this.options[type + 's'][id];
          } else {
            /* istanbul ignore if */
            if (type === 'component') {
              validateComponentName(id);
            }

            if (type === 'component' && isPlainObject(definition)) {
              definition.name = definition.name || id;
              definition = this.options._base.extend(definition);
            }

            if (type === 'directive' && typeof definition === 'function') {
              definition = {
                bind: definition,
                update: definition
              };
            }

            this.options[type + 's'][id] = definition;
            return definition;
          }
        };
      });
    }
    /*  */


    function getComponentName(opts) {
      return opts && (opts.Ctor.options.name || opts.tag);
    }

    function matches(pattern, name) {
      if (Array.isArray(pattern)) {
        return pattern.indexOf(name) > -1;
      } else if (typeof pattern === 'string') {
        return pattern.split(',').indexOf(name) > -1;
      } else if (isRegExp(pattern)) {
        return pattern.test(name);
      }
      /* istanbul ignore next */


      return false;
    }

    function pruneCache(keepAliveInstance, filter) {
      var cache = keepAliveInstance.cache;
      var keys = keepAliveInstance.keys;
      var _vnode = keepAliveInstance._vnode;

      for (var key in cache) {
        var cachedNode = cache[key];

        if (cachedNode) {
          var name = getComponentName(cachedNode.componentOptions);

          if (name && !filter(name)) {
            pruneCacheEntry(cache, key, keys, _vnode);
          }
        }
      }
    }

    function pruneCacheEntry(cache, key, keys, current) {
      var cached$$1 = cache[key];

      if (cached$$1 && (!current || cached$$1.tag !== current.tag)) {
        cached$$1.componentInstance.$destroy();
      }

      cache[key] = null;
      remove(keys, key);
    }

    var patternTypes = [String, RegExp, Array];
    var KeepAlive = {
      name: 'keep-alive',
      abstract: true,
      props: {
        include: patternTypes,
        exclude: patternTypes,
        max: [String, Number]
      },
      created: function created() {
        this.cache = Object.create(null);
        this.keys = [];
      },
      destroyed: function destroyed() {
        for (var key in this.cache) {
          pruneCacheEntry(this.cache, key, this.keys);
        }
      },
      mounted: function mounted() {
        var this$1 = this;
        this.$watch('include', function (val) {
          pruneCache(this$1, function (name) {
            return matches(val, name);
          });
        });
        this.$watch('exclude', function (val) {
          pruneCache(this$1, function (name) {
            return !matches(val, name);
          });
        });
      },
      render: function render() {
        var slot = this.$slots.default;
        var vnode = getFirstComponentChild(slot);
        var componentOptions = vnode && vnode.componentOptions;

        if (componentOptions) {
          // check pattern
          var name = getComponentName(componentOptions);
          var ref = this;
          var include = ref.include;
          var exclude = ref.exclude;

          if ( // not included
          include && (!name || !matches(include, name)) || // excluded
          exclude && name && matches(exclude, name)) {
            return vnode;
          }

          var ref$1 = this;
          var cache = ref$1.cache;
          var keys = ref$1.keys;
          var key = vnode.key == null // same constructor may get registered as different local components
          // so cid alone is not enough (#3269)
          ? componentOptions.Ctor.cid + (componentOptions.tag ? "::" + componentOptions.tag : '') : vnode.key;

          if (cache[key]) {
            vnode.componentInstance = cache[key].componentInstance; // make current key freshest

            remove(keys, key);
            keys.push(key);
          } else {
            cache[key] = vnode;
            keys.push(key); // prune oldest entry

            if (this.max && keys.length > parseInt(this.max)) {
              pruneCacheEntry(cache, keys[0], keys, this._vnode);
            }
          }

          vnode.data.keepAlive = true;
        }

        return vnode || slot && slot[0];
      }
    };
    var builtInComponents = {
      KeepAlive: KeepAlive
    };
    /*  */

    function initGlobalAPI(Vue) {
      // config
      var configDef = {};

      configDef.get = function () {
        return config;
      };

      {
        configDef.set = function () {
          warn('Do not replace the Vue.config object, set individual fields instead.');
        };
      }
      Object.defineProperty(Vue, 'config', configDef); // exposed util methods.
      // NOTE: these are not considered part of the public API - avoid relying on
      // them unless you are aware of the risk.

      Vue.util = {
        warn: warn,
        extend: extend,
        mergeOptions: mergeOptions,
        defineReactive: defineReactive$$1
      };
      Vue.set = set;
      Vue.delete = del;
      Vue.nextTick = nextTick; // 2.6 explicit observable API

      Vue.observable = function (obj) {
        observe(obj);
        return obj;
      };

      Vue.options = Object.create(null);
      ASSET_TYPES.forEach(function (type) {
        Vue.options[type + 's'] = Object.create(null);
      }); // this is used to identify the "base" constructor to extend all plain-object
      // components with in Weex's multi-instance scenarios.

      Vue.options._base = Vue;
      extend(Vue.options.components, builtInComponents);
      initUse(Vue);
      initMixin$1(Vue);
      initExtend(Vue);
      initAssetRegisters(Vue);
    }

    initGlobalAPI(Vue);
    Object.defineProperty(Vue.prototype, '$isServer', {
      get: isServerRendering
    });
    Object.defineProperty(Vue.prototype, '$ssrContext', {
      get: function get() {
        /* istanbul ignore next */
        return this.$vnode && this.$vnode.ssrContext;
      }
    }); // expose FunctionalRenderContext for ssr runtime helper installation

    Object.defineProperty(Vue, 'FunctionalRenderContext', {
      value: FunctionalRenderContext
    });
    Vue.version = '2.6.12';
    /*  */
    // these are reserved for web because they are directly compiled away
    // during template compilation

    var isReservedAttr = makeMap('style,class'); // attributes that should be using props for binding

    var acceptValue = makeMap('input,textarea,option,select,progress');

    var mustUseProp = function mustUseProp(tag, type, attr) {
      return attr === 'value' && acceptValue(tag) && type !== 'button' || attr === 'selected' && tag === 'option' || attr === 'checked' && tag === 'input' || attr === 'muted' && tag === 'video';
    };

    var isEnumeratedAttr = makeMap('contenteditable,draggable,spellcheck');
    var isValidContentEditableValue = makeMap('events,caret,typing,plaintext-only');

    var convertEnumeratedValue = function convertEnumeratedValue(key, value) {
      return isFalsyAttrValue(value) || value === 'false' ? 'false' // allow arbitrary string value for contenteditable
      : key === 'contenteditable' && isValidContentEditableValue(value) ? value : 'true';
    };

    var isBooleanAttr = makeMap('allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,' + 'default,defaultchecked,defaultmuted,defaultselected,defer,disabled,' + 'enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,' + 'muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,' + 'required,reversed,scoped,seamless,selected,sortable,translate,' + 'truespeed,typemustmatch,visible');
    var xlinkNS = 'http://www.w3.org/1999/xlink';

    var isXlink = function isXlink(name) {
      return name.charAt(5) === ':' && name.slice(0, 5) === 'xlink';
    };

    var getXlinkProp = function getXlinkProp(name) {
      return isXlink(name) ? name.slice(6, name.length) : '';
    };

    var isFalsyAttrValue = function isFalsyAttrValue(val) {
      return val == null || val === false;
    };
    /*  */


    function genClassForVnode(vnode) {
      var data = vnode.data;
      var parentNode = vnode;
      var childNode = vnode;

      while (isDef(childNode.componentInstance)) {
        childNode = childNode.componentInstance._vnode;

        if (childNode && childNode.data) {
          data = mergeClassData(childNode.data, data);
        }
      }

      while (isDef(parentNode = parentNode.parent)) {
        if (parentNode && parentNode.data) {
          data = mergeClassData(data, parentNode.data);
        }
      }

      return renderClass(data.staticClass, data.class);
    }

    function mergeClassData(child, parent) {
      return {
        staticClass: concat(child.staticClass, parent.staticClass),
        class: isDef(child.class) ? [child.class, parent.class] : parent.class
      };
    }

    function renderClass(staticClass, dynamicClass) {
      if (isDef(staticClass) || isDef(dynamicClass)) {
        return concat(staticClass, stringifyClass(dynamicClass));
      }
      /* istanbul ignore next */


      return '';
    }

    function concat(a, b) {
      return a ? b ? a + ' ' + b : a : b || '';
    }

    function stringifyClass(value) {
      if (Array.isArray(value)) {
        return stringifyArray(value);
      }

      if (isObject(value)) {
        return stringifyObject(value);
      }

      if (typeof value === 'string') {
        return value;
      }
      /* istanbul ignore next */


      return '';
    }

    function stringifyArray(value) {
      var res = '';
      var stringified;

      for (var i = 0, l = value.length; i < l; i++) {
        if (isDef(stringified = stringifyClass(value[i])) && stringified !== '') {
          if (res) {
            res += ' ';
          }

          res += stringified;
        }
      }

      return res;
    }

    function stringifyObject(value) {
      var res = '';

      for (var key in value) {
        if (value[key]) {
          if (res) {
            res += ' ';
          }

          res += key;
        }
      }

      return res;
    }
    /*  */


    var namespaceMap = {
      svg: 'http://www.w3.org/2000/svg',
      math: 'http://www.w3.org/1998/Math/MathML'
    };
    var isHTMLTag = makeMap('html,body,base,head,link,meta,style,title,' + 'address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,' + 'div,dd,dl,dt,figcaption,figure,picture,hr,img,li,main,ol,p,pre,ul,' + 'a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,' + 's,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,' + 'embed,object,param,source,canvas,script,noscript,del,ins,' + 'caption,col,colgroup,table,thead,tbody,td,th,tr,' + 'button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,' + 'output,progress,select,textarea,' + 'details,dialog,menu,menuitem,summary,' + 'content,element,shadow,template,blockquote,iframe,tfoot'); // this map is intentionally selective, only covering SVG elements that may
    // contain child elements.

    var isSVG = makeMap('svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font-face,' + 'foreignObject,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,' + 'polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view', true);

    var isPreTag = function isPreTag(tag) {
      return tag === 'pre';
    };

    var isReservedTag = function isReservedTag(tag) {
      return isHTMLTag(tag) || isSVG(tag);
    };

    function getTagNamespace(tag) {
      if (isSVG(tag)) {
        return 'svg';
      } // basic support for MathML
      // note it doesn't support other MathML elements being component roots


      if (tag === 'math') {
        return 'math';
      }
    }

    var unknownElementCache = Object.create(null);

    function isUnknownElement(tag) {
      /* istanbul ignore if */
      if (!inBrowser) {
        return true;
      }

      if (isReservedTag(tag)) {
        return false;
      }

      tag = tag.toLowerCase();
      /* istanbul ignore if */

      if (unknownElementCache[tag] != null) {
        return unknownElementCache[tag];
      }

      var el = document.createElement(tag);

      if (tag.indexOf('-') > -1) {
        // http://stackoverflow.com/a/28210364/1070244
        return unknownElementCache[tag] = el.constructor === window.HTMLUnknownElement || el.constructor === window.HTMLElement;
      } else {
        return unknownElementCache[tag] = /HTMLUnknownElement/.test(el.toString());
      }
    }

    var isTextInputType = makeMap('text,number,password,search,email,tel,url');
    /*  */

    /**
     * Query an element selector if it's not an element already.
     */

    function query(el) {
      if (typeof el === 'string') {
        var selected = document.querySelector(el);

        if (!selected) {
          warn('Cannot find element: ' + el);
          return document.createElement('div');
        }

        return selected;
      } else {
        return el;
      }
    }
    /*  */


    function createElement$1(tagName, vnode) {
      var elm = document.createElement(tagName);

      if (tagName !== 'select') {
        return elm;
      } // false or null will remove the attribute but undefined will not


      if (vnode.data && vnode.data.attrs && vnode.data.attrs.multiple !== undefined) {
        elm.setAttribute('multiple', 'multiple');
      }

      return elm;
    }

    function createElementNS(namespace, tagName) {
      return document.createElementNS(namespaceMap[namespace], tagName);
    }

    function createTextNode(text) {
      return document.createTextNode(text);
    }

    function createComment(text) {
      return document.createComment(text);
    }

    function insertBefore(parentNode, newNode, referenceNode) {
      parentNode.insertBefore(newNode, referenceNode);
    }

    function removeChild(node, child) {
      node.removeChild(child);
    }

    function appendChild(node, child) {
      node.appendChild(child);
    }

    function parentNode(node) {
      return node.parentNode;
    }

    function nextSibling(node) {
      return node.nextSibling;
    }

    function tagName(node) {
      return node.tagName;
    }

    function setTextContent(node, text) {
      node.textContent = text;
    }

    function setStyleScope(node, scopeId) {
      node.setAttribute(scopeId, '');
    }

    var nodeOps = /*#__PURE__*/Object.freeze({
      createElement: createElement$1,
      createElementNS: createElementNS,
      createTextNode: createTextNode,
      createComment: createComment,
      insertBefore: insertBefore,
      removeChild: removeChild,
      appendChild: appendChild,
      parentNode: parentNode,
      nextSibling: nextSibling,
      tagName: tagName,
      setTextContent: setTextContent,
      setStyleScope: setStyleScope
    });
    /*  */

    var ref = {
      create: function create(_, vnode) {
        registerRef(vnode);
      },
      update: function update(oldVnode, vnode) {
        if (oldVnode.data.ref !== vnode.data.ref) {
          registerRef(oldVnode, true);
          registerRef(vnode);
        }
      },
      destroy: function destroy(vnode) {
        registerRef(vnode, true);
      }
    };

    function registerRef(vnode, isRemoval) {
      var key = vnode.data.ref;

      if (!isDef(key)) {
        return;
      }

      var vm = vnode.context;
      var ref = vnode.componentInstance || vnode.elm;
      var refs = vm.$refs;

      if (isRemoval) {
        if (Array.isArray(refs[key])) {
          remove(refs[key], ref);
        } else if (refs[key] === ref) {
          refs[key] = undefined;
        }
      } else {
        if (vnode.data.refInFor) {
          if (!Array.isArray(refs[key])) {
            refs[key] = [ref];
          } else if (refs[key].indexOf(ref) < 0) {
            // $flow-disable-line
            refs[key].push(ref);
          }
        } else {
          refs[key] = ref;
        }
      }
    }
    /**
     * Virtual DOM patching algorithm based on Snabbdom by
     * Simon Friis Vindum (@paldepind)
     * Licensed under the MIT License
     * https://github.com/paldepind/snabbdom/blob/master/LICENSE
     *
     * modified by Evan You (@yyx990803)
     *
     * Not type-checking this because this file is perf-critical and the cost
     * of making flow understand it is not worth it.
     */


    var emptyNode = new VNode('', {}, []);
    var hooks = ['create', 'activate', 'update', 'remove', 'destroy'];

    function sameVnode(a, b) {
      return a.key === b.key && (a.tag === b.tag && a.isComment === b.isComment && isDef(a.data) === isDef(b.data) && sameInputType(a, b) || isTrue(a.isAsyncPlaceholder) && a.asyncFactory === b.asyncFactory && isUndef(b.asyncFactory.error));
    }

    function sameInputType(a, b) {
      if (a.tag !== 'input') {
        return true;
      }

      var i;
      var typeA = isDef(i = a.data) && isDef(i = i.attrs) && i.type;
      var typeB = isDef(i = b.data) && isDef(i = i.attrs) && i.type;
      return typeA === typeB || isTextInputType(typeA) && isTextInputType(typeB);
    }

    function createKeyToOldIdx(children, beginIdx, endIdx) {
      var i, key;
      var map = {};

      for (i = beginIdx; i <= endIdx; ++i) {
        key = children[i].key;

        if (isDef(key)) {
          map[key] = i;
        }
      }

      return map;
    }

    function createPatchFunction(backend) {
      var i, j;
      var cbs = {};
      var modules = backend.modules;
      var nodeOps = backend.nodeOps;

      for (i = 0; i < hooks.length; ++i) {
        cbs[hooks[i]] = [];

        for (j = 0; j < modules.length; ++j) {
          if (isDef(modules[j][hooks[i]])) {
            cbs[hooks[i]].push(modules[j][hooks[i]]);
          }
        }
      }

      function emptyNodeAt(elm) {
        return new VNode(nodeOps.tagName(elm).toLowerCase(), {}, [], undefined, elm);
      }

      function createRmCb(childElm, listeners) {
        function remove$$1() {
          if (--remove$$1.listeners === 0) {
            removeNode(childElm);
          }
        }

        remove$$1.listeners = listeners;
        return remove$$1;
      }

      function removeNode(el) {
        var parent = nodeOps.parentNode(el); // element may have already been removed due to v-html / v-text

        if (isDef(parent)) {
          nodeOps.removeChild(parent, el);
        }
      }

      function isUnknownElement$$1(vnode, inVPre) {
        return !inVPre && !vnode.ns && !(config.ignoredElements.length && config.ignoredElements.some(function (ignore) {
          return isRegExp(ignore) ? ignore.test(vnode.tag) : ignore === vnode.tag;
        })) && config.isUnknownElement(vnode.tag);
      }

      var creatingElmInVPre = 0;

      function createElm(vnode, insertedVnodeQueue, parentElm, refElm, nested, ownerArray, index) {
        if (isDef(vnode.elm) && isDef(ownerArray)) {
          // This vnode was used in a previous render!
          // now it's used as a new node, overwriting its elm would cause
          // potential patch errors down the road when it's used as an insertion
          // reference node. Instead, we clone the node on-demand before creating
          // associated DOM element for it.
          vnode = ownerArray[index] = cloneVNode(vnode);
        }

        vnode.isRootInsert = !nested; // for transition enter check

        if (createComponent(vnode, insertedVnodeQueue, parentElm, refElm)) {
          return;
        }

        var data = vnode.data;
        var children = vnode.children;
        var tag = vnode.tag;

        if (isDef(tag)) {
          {
            if (data && data.pre) {
              creatingElmInVPre++;
            }

            if (isUnknownElement$$1(vnode, creatingElmInVPre)) {
              warn('Unknown custom element: <' + tag + '> - did you ' + 'register the component correctly? For recursive components, ' + 'make sure to provide the "name" option.', vnode.context);
            }
          }
          vnode.elm = vnode.ns ? nodeOps.createElementNS(vnode.ns, tag) : nodeOps.createElement(tag, vnode);
          setScope(vnode);
          /* istanbul ignore if */

          {
            createChildren(vnode, children, insertedVnodeQueue);

            if (isDef(data)) {
              invokeCreateHooks(vnode, insertedVnodeQueue);
            }

            insert(parentElm, vnode.elm, refElm);
          }

          if (data && data.pre) {
            creatingElmInVPre--;
          }
        } else if (isTrue(vnode.isComment)) {
          vnode.elm = nodeOps.createComment(vnode.text);
          insert(parentElm, vnode.elm, refElm);
        } else {
          vnode.elm = nodeOps.createTextNode(vnode.text);
          insert(parentElm, vnode.elm, refElm);
        }
      }

      function createComponent(vnode, insertedVnodeQueue, parentElm, refElm) {
        var i = vnode.data;

        if (isDef(i)) {
          var isReactivated = isDef(vnode.componentInstance) && i.keepAlive;

          if (isDef(i = i.hook) && isDef(i = i.init)) {
            i(vnode, false
            /* hydrating */
            );
          } // after calling the init hook, if the vnode is a child component
          // it should've created a child instance and mounted it. the child
          // component also has set the placeholder vnode's elm.
          // in that case we can just return the element and be done.


          if (isDef(vnode.componentInstance)) {
            initComponent(vnode, insertedVnodeQueue);
            insert(parentElm, vnode.elm, refElm);

            if (isTrue(isReactivated)) {
              reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm);
            }

            return true;
          }
        }
      }

      function initComponent(vnode, insertedVnodeQueue) {
        if (isDef(vnode.data.pendingInsert)) {
          insertedVnodeQueue.push.apply(insertedVnodeQueue, vnode.data.pendingInsert);
          vnode.data.pendingInsert = null;
        }

        vnode.elm = vnode.componentInstance.$el;

        if (isPatchable(vnode)) {
          invokeCreateHooks(vnode, insertedVnodeQueue);
          setScope(vnode);
        } else {
          // empty component root.
          // skip all element-related modules except for ref (#3455)
          registerRef(vnode); // make sure to invoke the insert hook

          insertedVnodeQueue.push(vnode);
        }
      }

      function reactivateComponent(vnode, insertedVnodeQueue, parentElm, refElm) {
        var i; // hack for #4339: a reactivated component with inner transition
        // does not trigger because the inner node's created hooks are not called
        // again. It's not ideal to involve module-specific logic in here but
        // there doesn't seem to be a better way to do it.

        var innerNode = vnode;

        while (innerNode.componentInstance) {
          innerNode = innerNode.componentInstance._vnode;

          if (isDef(i = innerNode.data) && isDef(i = i.transition)) {
            for (i = 0; i < cbs.activate.length; ++i) {
              cbs.activate[i](emptyNode, innerNode);
            }

            insertedVnodeQueue.push(innerNode);
            break;
          }
        } // unlike a newly created component,
        // a reactivated keep-alive component doesn't insert itself


        insert(parentElm, vnode.elm, refElm);
      }

      function insert(parent, elm, ref$$1) {
        if (isDef(parent)) {
          if (isDef(ref$$1)) {
            if (nodeOps.parentNode(ref$$1) === parent) {
              nodeOps.insertBefore(parent, elm, ref$$1);
            }
          } else {
            nodeOps.appendChild(parent, elm);
          }
        }
      }

      function createChildren(vnode, children, insertedVnodeQueue) {
        if (Array.isArray(children)) {
          {
            checkDuplicateKeys(children);
          }

          for (var i = 0; i < children.length; ++i) {
            createElm(children[i], insertedVnodeQueue, vnode.elm, null, true, children, i);
          }
        } else if (isPrimitive(vnode.text)) {
          nodeOps.appendChild(vnode.elm, nodeOps.createTextNode(String(vnode.text)));
        }
      }

      function isPatchable(vnode) {
        while (vnode.componentInstance) {
          vnode = vnode.componentInstance._vnode;
        }

        return isDef(vnode.tag);
      }

      function invokeCreateHooks(vnode, insertedVnodeQueue) {
        for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
          cbs.create[i$1](emptyNode, vnode);
        }

        i = vnode.data.hook; // Reuse variable

        if (isDef(i)) {
          if (isDef(i.create)) {
            i.create(emptyNode, vnode);
          }

          if (isDef(i.insert)) {
            insertedVnodeQueue.push(vnode);
          }
        }
      } // set scope id attribute for scoped CSS.
      // this is implemented as a special case to avoid the overhead
      // of going through the normal attribute patching process.


      function setScope(vnode) {
        var i;

        if (isDef(i = vnode.fnScopeId)) {
          nodeOps.setStyleScope(vnode.elm, i);
        } else {
          var ancestor = vnode;

          while (ancestor) {
            if (isDef(i = ancestor.context) && isDef(i = i.$options._scopeId)) {
              nodeOps.setStyleScope(vnode.elm, i);
            }

            ancestor = ancestor.parent;
          }
        } // for slot content they should also get the scopeId from the host instance.


        if (isDef(i = activeInstance) && i !== vnode.context && i !== vnode.fnContext && isDef(i = i.$options._scopeId)) {
          nodeOps.setStyleScope(vnode.elm, i);
        }
      }

      function addVnodes(parentElm, refElm, vnodes, startIdx, endIdx, insertedVnodeQueue) {
        for (; startIdx <= endIdx; ++startIdx) {
          createElm(vnodes[startIdx], insertedVnodeQueue, parentElm, refElm, false, vnodes, startIdx);
        }
      }

      function invokeDestroyHook(vnode) {
        var i, j;
        var data = vnode.data;

        if (isDef(data)) {
          if (isDef(i = data.hook) && isDef(i = i.destroy)) {
            i(vnode);
          }

          for (i = 0; i < cbs.destroy.length; ++i) {
            cbs.destroy[i](vnode);
          }
        }

        if (isDef(i = vnode.children)) {
          for (j = 0; j < vnode.children.length; ++j) {
            invokeDestroyHook(vnode.children[j]);
          }
        }
      }

      function removeVnodes(vnodes, startIdx, endIdx) {
        for (; startIdx <= endIdx; ++startIdx) {
          var ch = vnodes[startIdx];

          if (isDef(ch)) {
            if (isDef(ch.tag)) {
              removeAndInvokeRemoveHook(ch);
              invokeDestroyHook(ch);
            } else {
              // Text node
              removeNode(ch.elm);
            }
          }
        }
      }

      function removeAndInvokeRemoveHook(vnode, rm) {
        if (isDef(rm) || isDef(vnode.data)) {
          var i;
          var listeners = cbs.remove.length + 1;

          if (isDef(rm)) {
            // we have a recursively passed down rm callback
            // increase the listeners count
            rm.listeners += listeners;
          } else {
            // directly removing
            rm = createRmCb(vnode.elm, listeners);
          } // recursively invoke hooks on child component root node


          if (isDef(i = vnode.componentInstance) && isDef(i = i._vnode) && isDef(i.data)) {
            removeAndInvokeRemoveHook(i, rm);
          }

          for (i = 0; i < cbs.remove.length; ++i) {
            cbs.remove[i](vnode, rm);
          }

          if (isDef(i = vnode.data.hook) && isDef(i = i.remove)) {
            i(vnode, rm);
          } else {
            rm();
          }
        } else {
          removeNode(vnode.elm);
        }
      }

      function updateChildren(parentElm, oldCh, newCh, insertedVnodeQueue, removeOnly) {
        var oldStartIdx = 0;
        var newStartIdx = 0;
        var oldEndIdx = oldCh.length - 1;
        var oldStartVnode = oldCh[0];
        var oldEndVnode = oldCh[oldEndIdx];
        var newEndIdx = newCh.length - 1;
        var newStartVnode = newCh[0];
        var newEndVnode = newCh[newEndIdx];
        var oldKeyToIdx, idxInOld, vnodeToMove, refElm; // removeOnly is a special flag used only by <transition-group>
        // to ensure removed elements stay in correct relative positions
        // during leaving transitions

        var canMove = !removeOnly;
        {
          checkDuplicateKeys(newCh);
        }

        while (oldStartIdx <= oldEndIdx && newStartIdx <= newEndIdx) {
          if (isUndef(oldStartVnode)) {
            oldStartVnode = oldCh[++oldStartIdx]; // Vnode has been moved left
          } else if (isUndef(oldEndVnode)) {
            oldEndVnode = oldCh[--oldEndIdx];
          } else if (sameVnode(oldStartVnode, newStartVnode)) {
            patchVnode(oldStartVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
            oldStartVnode = oldCh[++oldStartIdx];
            newStartVnode = newCh[++newStartIdx];
          } else if (sameVnode(oldEndVnode, newEndVnode)) {
            patchVnode(oldEndVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
            oldEndVnode = oldCh[--oldEndIdx];
            newEndVnode = newCh[--newEndIdx];
          } else if (sameVnode(oldStartVnode, newEndVnode)) {
            // Vnode moved right
            patchVnode(oldStartVnode, newEndVnode, insertedVnodeQueue, newCh, newEndIdx);
            canMove && nodeOps.insertBefore(parentElm, oldStartVnode.elm, nodeOps.nextSibling(oldEndVnode.elm));
            oldStartVnode = oldCh[++oldStartIdx];
            newEndVnode = newCh[--newEndIdx];
          } else if (sameVnode(oldEndVnode, newStartVnode)) {
            // Vnode moved left
            patchVnode(oldEndVnode, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
            canMove && nodeOps.insertBefore(parentElm, oldEndVnode.elm, oldStartVnode.elm);
            oldEndVnode = oldCh[--oldEndIdx];
            newStartVnode = newCh[++newStartIdx];
          } else {
            if (isUndef(oldKeyToIdx)) {
              oldKeyToIdx = createKeyToOldIdx(oldCh, oldStartIdx, oldEndIdx);
            }

            idxInOld = isDef(newStartVnode.key) ? oldKeyToIdx[newStartVnode.key] : findIdxInOld(newStartVnode, oldCh, oldStartIdx, oldEndIdx);

            if (isUndef(idxInOld)) {
              // New element
              createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
            } else {
              vnodeToMove = oldCh[idxInOld];

              if (sameVnode(vnodeToMove, newStartVnode)) {
                patchVnode(vnodeToMove, newStartVnode, insertedVnodeQueue, newCh, newStartIdx);
                oldCh[idxInOld] = undefined;
                canMove && nodeOps.insertBefore(parentElm, vnodeToMove.elm, oldStartVnode.elm);
              } else {
                // same key but different element. treat as new element
                createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm, false, newCh, newStartIdx);
              }
            }

            newStartVnode = newCh[++newStartIdx];
          }
        }

        if (oldStartIdx > oldEndIdx) {
          refElm = isUndef(newCh[newEndIdx + 1]) ? null : newCh[newEndIdx + 1].elm;
          addVnodes(parentElm, refElm, newCh, newStartIdx, newEndIdx, insertedVnodeQueue);
        } else if (newStartIdx > newEndIdx) {
          removeVnodes(oldCh, oldStartIdx, oldEndIdx);
        }
      }

      function checkDuplicateKeys(children) {
        var seenKeys = {};

        for (var i = 0; i < children.length; i++) {
          var vnode = children[i];
          var key = vnode.key;

          if (isDef(key)) {
            if (seenKeys[key]) {
              warn("Duplicate keys detected: '" + key + "'. This may cause an update error.", vnode.context);
            } else {
              seenKeys[key] = true;
            }
          }
        }
      }

      function findIdxInOld(node, oldCh, start, end) {
        for (var i = start; i < end; i++) {
          var c = oldCh[i];

          if (isDef(c) && sameVnode(node, c)) {
            return i;
          }
        }
      }

      function patchVnode(oldVnode, vnode, insertedVnodeQueue, ownerArray, index, removeOnly) {
        if (oldVnode === vnode) {
          return;
        }

        if (isDef(vnode.elm) && isDef(ownerArray)) {
          // clone reused vnode
          vnode = ownerArray[index] = cloneVNode(vnode);
        }

        var elm = vnode.elm = oldVnode.elm;

        if (isTrue(oldVnode.isAsyncPlaceholder)) {
          if (isDef(vnode.asyncFactory.resolved)) {
            hydrate(oldVnode.elm, vnode, insertedVnodeQueue);
          } else {
            vnode.isAsyncPlaceholder = true;
          }

          return;
        } // reuse element for static trees.
        // note we only do this if the vnode is cloned -
        // if the new node is not cloned it means the render functions have been
        // reset by the hot-reload-api and we need to do a proper re-render.


        if (isTrue(vnode.isStatic) && isTrue(oldVnode.isStatic) && vnode.key === oldVnode.key && (isTrue(vnode.isCloned) || isTrue(vnode.isOnce))) {
          vnode.componentInstance = oldVnode.componentInstance;
          return;
        }

        var i;
        var data = vnode.data;

        if (isDef(data) && isDef(i = data.hook) && isDef(i = i.prepatch)) {
          i(oldVnode, vnode);
        }

        var oldCh = oldVnode.children;
        var ch = vnode.children;

        if (isDef(data) && isPatchable(vnode)) {
          for (i = 0; i < cbs.update.length; ++i) {
            cbs.update[i](oldVnode, vnode);
          }

          if (isDef(i = data.hook) && isDef(i = i.update)) {
            i(oldVnode, vnode);
          }
        }

        if (isUndef(vnode.text)) {
          if (isDef(oldCh) && isDef(ch)) {
            if (oldCh !== ch) {
              updateChildren(elm, oldCh, ch, insertedVnodeQueue, removeOnly);
            }
          } else if (isDef(ch)) {
            {
              checkDuplicateKeys(ch);
            }

            if (isDef(oldVnode.text)) {
              nodeOps.setTextContent(elm, '');
            }

            addVnodes(elm, null, ch, 0, ch.length - 1, insertedVnodeQueue);
          } else if (isDef(oldCh)) {
            removeVnodes(oldCh, 0, oldCh.length - 1);
          } else if (isDef(oldVnode.text)) {
            nodeOps.setTextContent(elm, '');
          }
        } else if (oldVnode.text !== vnode.text) {
          nodeOps.setTextContent(elm, vnode.text);
        }

        if (isDef(data)) {
          if (isDef(i = data.hook) && isDef(i = i.postpatch)) {
            i(oldVnode, vnode);
          }
        }
      }

      function invokeInsertHook(vnode, queue, initial) {
        // delay insert hooks for component root nodes, invoke them after the
        // element is really inserted
        if (isTrue(initial) && isDef(vnode.parent)) {
          vnode.parent.data.pendingInsert = queue;
        } else {
          for (var i = 0; i < queue.length; ++i) {
            queue[i].data.hook.insert(queue[i]);
          }
        }
      }

      var hydrationBailed = false; // list of modules that can skip create hook during hydration because they
      // are already rendered on the client or has no need for initialization
      // Note: style is excluded because it relies on initial clone for future
      // deep updates (#7063).

      var isRenderedModule = makeMap('attrs,class,staticClass,staticStyle,key'); // Note: this is a browser-only function so we can assume elms are DOM nodes.

      function hydrate(elm, vnode, insertedVnodeQueue, inVPre) {
        var i;
        var tag = vnode.tag;
        var data = vnode.data;
        var children = vnode.children;
        inVPre = inVPre || data && data.pre;
        vnode.elm = elm;

        if (isTrue(vnode.isComment) && isDef(vnode.asyncFactory)) {
          vnode.isAsyncPlaceholder = true;
          return true;
        } // assert node match


        {
          if (!assertNodeMatch(elm, vnode, inVPre)) {
            return false;
          }
        }

        if (isDef(data)) {
          if (isDef(i = data.hook) && isDef(i = i.init)) {
            i(vnode, true
            /* hydrating */
            );
          }

          if (isDef(i = vnode.componentInstance)) {
            // child component. it should have hydrated its own tree.
            initComponent(vnode, insertedVnodeQueue);
            return true;
          }
        }

        if (isDef(tag)) {
          if (isDef(children)) {
            // empty element, allow client to pick up and populate children
            if (!elm.hasChildNodes()) {
              createChildren(vnode, children, insertedVnodeQueue);
            } else {
              // v-html and domProps: innerHTML
              if (isDef(i = data) && isDef(i = i.domProps) && isDef(i = i.innerHTML)) {
                if (i !== elm.innerHTML) {
                  /* istanbul ignore if */
                  if (typeof console !== 'undefined' && !hydrationBailed) {
                    hydrationBailed = true;
                    console.warn('Parent: ', elm);
                    console.warn('server innerHTML: ', i);
                    console.warn('client innerHTML: ', elm.innerHTML);
                  }

                  return false;
                }
              } else {
                // iterate and compare children lists
                var childrenMatch = true;
                var childNode = elm.firstChild;

                for (var i$1 = 0; i$1 < children.length; i$1++) {
                  if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue, inVPre)) {
                    childrenMatch = false;
                    break;
                  }

                  childNode = childNode.nextSibling;
                } // if childNode is not null, it means the actual childNodes list is
                // longer than the virtual children list.


                if (!childrenMatch || childNode) {
                  /* istanbul ignore if */
                  if (typeof console !== 'undefined' && !hydrationBailed) {
                    hydrationBailed = true;
                    console.warn('Parent: ', elm);
                    console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
                  }

                  return false;
                }
              }
            }
          }

          if (isDef(data)) {
            var fullInvoke = false;

            for (var key in data) {
              if (!isRenderedModule(key)) {
                fullInvoke = true;
                invokeCreateHooks(vnode, insertedVnodeQueue);
                break;
              }
            }

            if (!fullInvoke && data['class']) {
              // ensure collecting deps for deep class bindings for future updates
              traverse(data['class']);
            }
          }
        } else if (elm.data !== vnode.text) {
          elm.data = vnode.text;
        }

        return true;
      }

      function assertNodeMatch(node, vnode, inVPre) {
        if (isDef(vnode.tag)) {
          return vnode.tag.indexOf('vue-component') === 0 || !isUnknownElement$$1(vnode, inVPre) && vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase());
        } else {
          return node.nodeType === (vnode.isComment ? 8 : 3);
        }
      }

      return function patch(oldVnode, vnode, hydrating, removeOnly) {
        if (isUndef(vnode)) {
          if (isDef(oldVnode)) {
            invokeDestroyHook(oldVnode);
          }

          return;
        }

        var isInitialPatch = false;
        var insertedVnodeQueue = [];

        if (isUndef(oldVnode)) {
          // empty mount (likely as component), create new root element
          isInitialPatch = true;
          createElm(vnode, insertedVnodeQueue);
        } else {
          var isRealElement = isDef(oldVnode.nodeType);

          if (!isRealElement && sameVnode(oldVnode, vnode)) {
            // patch existing root node
            patchVnode(oldVnode, vnode, insertedVnodeQueue, null, null, removeOnly);
          } else {
            if (isRealElement) {
              // mounting to a real element
              // check if this is server-rendered content and if we can perform
              // a successful hydration.
              if (oldVnode.nodeType === 1 && oldVnode.hasAttribute(SSR_ATTR)) {
                oldVnode.removeAttribute(SSR_ATTR);
                hydrating = true;
              }

              if (isTrue(hydrating)) {
                if (hydrate(oldVnode, vnode, insertedVnodeQueue)) {
                  invokeInsertHook(vnode, insertedVnodeQueue, true);
                  return oldVnode;
                } else {
                  warn('The client-side rendered virtual DOM tree is not matching ' + 'server-rendered content. This is likely caused by incorrect ' + 'HTML markup, for example nesting block-level elements inside ' + '<p>, or missing <tbody>. Bailing hydration and performing ' + 'full client-side render.');
                }
              } // either not server-rendered, or hydration failed.
              // create an empty node and replace it


              oldVnode = emptyNodeAt(oldVnode);
            } // replacing existing element


            var oldElm = oldVnode.elm;
            var parentElm = nodeOps.parentNode(oldElm); // create new node

            createElm(vnode, insertedVnodeQueue, // extremely rare edge case: do not insert if old element is in a
            // leaving transition. Only happens when combining transition +
            // keep-alive + HOCs. (#4590)
            oldElm._leaveCb ? null : parentElm, nodeOps.nextSibling(oldElm)); // update parent placeholder node element, recursively

            if (isDef(vnode.parent)) {
              var ancestor = vnode.parent;
              var patchable = isPatchable(vnode);

              while (ancestor) {
                for (var i = 0; i < cbs.destroy.length; ++i) {
                  cbs.destroy[i](ancestor);
                }

                ancestor.elm = vnode.elm;

                if (patchable) {
                  for (var i$1 = 0; i$1 < cbs.create.length; ++i$1) {
                    cbs.create[i$1](emptyNode, ancestor);
                  } // #6513
                  // invoke insert hooks that may have been merged by create hooks.
                  // e.g. for directives that uses the "inserted" hook.


                  var insert = ancestor.data.hook.insert;

                  if (insert.merged) {
                    // start at index 1 to avoid re-invoking component mounted hook
                    for (var i$2 = 1; i$2 < insert.fns.length; i$2++) {
                      insert.fns[i$2]();
                    }
                  }
                } else {
                  registerRef(ancestor);
                }

                ancestor = ancestor.parent;
              }
            } // destroy old node


            if (isDef(parentElm)) {
              removeVnodes([oldVnode], 0, 0);
            } else if (isDef(oldVnode.tag)) {
              invokeDestroyHook(oldVnode);
            }
          }
        }

        invokeInsertHook(vnode, insertedVnodeQueue, isInitialPatch);
        return vnode.elm;
      };
    }
    /*  */


    var directives = {
      create: updateDirectives,
      update: updateDirectives,
      destroy: function unbindDirectives(vnode) {
        updateDirectives(vnode, emptyNode);
      }
    };

    function updateDirectives(oldVnode, vnode) {
      if (oldVnode.data.directives || vnode.data.directives) {
        _update(oldVnode, vnode);
      }
    }

    function _update(oldVnode, vnode) {
      var isCreate = oldVnode === emptyNode;
      var isDestroy = vnode === emptyNode;
      var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
      var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
      var dirsWithInsert = [];
      var dirsWithPostpatch = [];
      var key, oldDir, dir;

      for (key in newDirs) {
        oldDir = oldDirs[key];
        dir = newDirs[key];

        if (!oldDir) {
          // new directive, bind
          callHook$1(dir, 'bind', vnode, oldVnode);

          if (dir.def && dir.def.inserted) {
            dirsWithInsert.push(dir);
          }
        } else {
          // existing directive, update
          dir.oldValue = oldDir.value;
          dir.oldArg = oldDir.arg;
          callHook$1(dir, 'update', vnode, oldVnode);

          if (dir.def && dir.def.componentUpdated) {
            dirsWithPostpatch.push(dir);
          }
        }
      }

      if (dirsWithInsert.length) {
        var callInsert = function callInsert() {
          for (var i = 0; i < dirsWithInsert.length; i++) {
            callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
          }
        };

        if (isCreate) {
          mergeVNodeHook(vnode, 'insert', callInsert);
        } else {
          callInsert();
        }
      }

      if (dirsWithPostpatch.length) {
        mergeVNodeHook(vnode, 'postpatch', function () {
          for (var i = 0; i < dirsWithPostpatch.length; i++) {
            callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
          }
        });
      }

      if (!isCreate) {
        for (key in oldDirs) {
          if (!newDirs[key]) {
            // no longer present, unbind
            callHook$1(oldDirs[key], 'unbind', oldVnode, oldVnode, isDestroy);
          }
        }
      }
    }

    var emptyModifiers = Object.create(null);

    function normalizeDirectives$1(dirs, vm) {
      var res = Object.create(null);

      if (!dirs) {
        // $flow-disable-line
        return res;
      }

      var i, dir;

      for (i = 0; i < dirs.length; i++) {
        dir = dirs[i];

        if (!dir.modifiers) {
          // $flow-disable-line
          dir.modifiers = emptyModifiers;
        }

        res[getRawDirName(dir)] = dir;
        dir.def = resolveAsset(vm.$options, 'directives', dir.name, true);
      } // $flow-disable-line


      return res;
    }

    function getRawDirName(dir) {
      return dir.rawName || dir.name + "." + Object.keys(dir.modifiers || {}).join('.');
    }

    function callHook$1(dir, hook, vnode, oldVnode, isDestroy) {
      var fn = dir.def && dir.def[hook];

      if (fn) {
        try {
          fn(vnode.elm, dir, vnode, oldVnode, isDestroy);
        } catch (e) {
          handleError(e, vnode.context, "directive " + dir.name + " " + hook + " hook");
        }
      }
    }

    var baseModules = [ref, directives];
    /*  */

    function updateAttrs(oldVnode, vnode) {
      var opts = vnode.componentOptions;

      if (isDef(opts) && opts.Ctor.options.inheritAttrs === false) {
        return;
      }

      if (isUndef(oldVnode.data.attrs) && isUndef(vnode.data.attrs)) {
        return;
      }

      var key, cur, old;
      var elm = vnode.elm;
      var oldAttrs = oldVnode.data.attrs || {};
      var attrs = vnode.data.attrs || {}; // clone observed objects, as the user probably wants to mutate it

      if (isDef(attrs.__ob__)) {
        attrs = vnode.data.attrs = extend({}, attrs);
      }

      for (key in attrs) {
        cur = attrs[key];
        old = oldAttrs[key];

        if (old !== cur) {
          setAttr(elm, key, cur);
        }
      } // #4391: in IE9, setting type can reset value for input[type=radio]
      // #6666: IE/Edge forces progress value down to 1 before setting a max

      /* istanbul ignore if */


      if ((isIE || isEdge) && attrs.value !== oldAttrs.value) {
        setAttr(elm, 'value', attrs.value);
      }

      for (key in oldAttrs) {
        if (isUndef(attrs[key])) {
          if (isXlink(key)) {
            elm.removeAttributeNS(xlinkNS, getXlinkProp(key));
          } else if (!isEnumeratedAttr(key)) {
            elm.removeAttribute(key);
          }
        }
      }
    }

    function setAttr(el, key, value) {
      if (el.tagName.indexOf('-') > -1) {
        baseSetAttr(el, key, value);
      } else if (isBooleanAttr(key)) {
        // set attribute for blank value
        // e.g. <option disabled>Select one</option>
        if (isFalsyAttrValue(value)) {
          el.removeAttribute(key);
        } else {
          // technically allowfullscreen is a boolean attribute for <iframe>,
          // but Flash expects a value of "true" when used on <embed> tag
          value = key === 'allowfullscreen' && el.tagName === 'EMBED' ? 'true' : key;
          el.setAttribute(key, value);
        }
      } else if (isEnumeratedAttr(key)) {
        el.setAttribute(key, convertEnumeratedValue(key, value));
      } else if (isXlink(key)) {
        if (isFalsyAttrValue(value)) {
          el.removeAttributeNS(xlinkNS, getXlinkProp(key));
        } else {
          el.setAttributeNS(xlinkNS, key, value);
        }
      } else {
        baseSetAttr(el, key, value);
      }
    }

    function baseSetAttr(el, key, value) {
      if (isFalsyAttrValue(value)) {
        el.removeAttribute(key);
      } else {
        // #7138: IE10 & 11 fires input event when setting placeholder on
        // <textarea>... block the first input event and remove the blocker
        // immediately.

        /* istanbul ignore if */
        if (isIE && !isIE9 && el.tagName === 'TEXTAREA' && key === 'placeholder' && value !== '' && !el.__ieph) {
          var blocker = function blocker(e) {
            e.stopImmediatePropagation();
            el.removeEventListener('input', blocker);
          };

          el.addEventListener('input', blocker); // $flow-disable-line

          el.__ieph = true;
          /* IE placeholder patched */
        }

        el.setAttribute(key, value);
      }
    }

    var attrs = {
      create: updateAttrs,
      update: updateAttrs
    };
    /*  */

    function updateClass(oldVnode, vnode) {
      var el = vnode.elm;
      var data = vnode.data;
      var oldData = oldVnode.data;

      if (isUndef(data.staticClass) && isUndef(data.class) && (isUndef(oldData) || isUndef(oldData.staticClass) && isUndef(oldData.class))) {
        return;
      }

      var cls = genClassForVnode(vnode); // handle transition classes

      var transitionClass = el._transitionClasses;

      if (isDef(transitionClass)) {
        cls = concat(cls, stringifyClass(transitionClass));
      } // set the class


      if (cls !== el._prevClass) {
        el.setAttribute('class', cls);
        el._prevClass = cls;
      }
    }

    var klass = {
      create: updateClass,
      update: updateClass
    };
    /*  */

    var validDivisionCharRE = /[\w).+\-_$\]]/;

    function parseFilters(exp) {
      var inSingle = false;
      var inDouble = false;
      var inTemplateString = false;
      var inRegex = false;
      var curly = 0;
      var square = 0;
      var paren = 0;
      var lastFilterIndex = 0;
      var c, prev, i, expression, filters;

      for (i = 0; i < exp.length; i++) {
        prev = c;
        c = exp.charCodeAt(i);

        if (inSingle) {
          if (c === 0x27 && prev !== 0x5C) {
            inSingle = false;
          }
        } else if (inDouble) {
          if (c === 0x22 && prev !== 0x5C) {
            inDouble = false;
          }
        } else if (inTemplateString) {
          if (c === 0x60 && prev !== 0x5C) {
            inTemplateString = false;
          }
        } else if (inRegex) {
          if (c === 0x2f && prev !== 0x5C) {
            inRegex = false;
          }
        } else if (c === 0x7C && // pipe
        exp.charCodeAt(i + 1) !== 0x7C && exp.charCodeAt(i - 1) !== 0x7C && !curly && !square && !paren) {
          if (expression === undefined) {
            // first filter, end of expression
            lastFilterIndex = i + 1;
            expression = exp.slice(0, i).trim();
          } else {
            pushFilter();
          }
        } else {
          switch (c) {
            case 0x22:
              inDouble = true;
              break;
            // "

            case 0x27:
              inSingle = true;
              break;
            // '

            case 0x60:
              inTemplateString = true;
              break;
            // `

            case 0x28:
              paren++;
              break;
            // (

            case 0x29:
              paren--;
              break;
            // )

            case 0x5B:
              square++;
              break;
            // [

            case 0x5D:
              square--;
              break;
            // ]

            case 0x7B:
              curly++;
              break;
            // {

            case 0x7D:
              curly--;
              break;
            // }
          }

          if (c === 0x2f) {
            // /
            var j = i - 1;
            var p = void 0; // find first non-whitespace prev char

            for (; j >= 0; j--) {
              p = exp.charAt(j);

              if (p !== ' ') {
                break;
              }
            }

            if (!p || !validDivisionCharRE.test(p)) {
              inRegex = true;
            }
          }
        }
      }

      if (expression === undefined) {
        expression = exp.slice(0, i).trim();
      } else if (lastFilterIndex !== 0) {
        pushFilter();
      }

      function pushFilter() {
        (filters || (filters = [])).push(exp.slice(lastFilterIndex, i).trim());
        lastFilterIndex = i + 1;
      }

      if (filters) {
        for (i = 0; i < filters.length; i++) {
          expression = wrapFilter(expression, filters[i]);
        }
      }

      return expression;
    }

    function wrapFilter(exp, filter) {
      var i = filter.indexOf('(');

      if (i < 0) {
        // _f: resolveFilter
        return "_f(\"" + filter + "\")(" + exp + ")";
      } else {
        var name = filter.slice(0, i);
        var args = filter.slice(i + 1);
        return "_f(\"" + name + "\")(" + exp + (args !== ')' ? ',' + args : args);
      }
    }
    /*  */

    /* eslint-disable no-unused-vars */


    function baseWarn(msg, range) {
      console.error("[Vue compiler]: " + msg);
    }
    /* eslint-enable no-unused-vars */


    function pluckModuleFunction(modules, key) {
      return modules ? modules.map(function (m) {
        return m[key];
      }).filter(function (_) {
        return _;
      }) : [];
    }

    function addProp(el, name, value, range, dynamic) {
      (el.props || (el.props = [])).push(rangeSetItem({
        name: name,
        value: value,
        dynamic: dynamic
      }, range));
      el.plain = false;
    }

    function addAttr(el, name, value, range, dynamic) {
      var attrs = dynamic ? el.dynamicAttrs || (el.dynamicAttrs = []) : el.attrs || (el.attrs = []);
      attrs.push(rangeSetItem({
        name: name,
        value: value,
        dynamic: dynamic
      }, range));
      el.plain = false;
    } // add a raw attr (use this in preTransforms)


    function addRawAttr(el, name, value, range) {
      el.attrsMap[name] = value;
      el.attrsList.push(rangeSetItem({
        name: name,
        value: value
      }, range));
    }

    function addDirective(el, name, rawName, value, arg, isDynamicArg, modifiers, range) {
      (el.directives || (el.directives = [])).push(rangeSetItem({
        name: name,
        rawName: rawName,
        value: value,
        arg: arg,
        isDynamicArg: isDynamicArg,
        modifiers: modifiers
      }, range));
      el.plain = false;
    }

    function prependModifierMarker(symbol, name, dynamic) {
      return dynamic ? "_p(" + name + ",\"" + symbol + "\")" : symbol + name; // mark the event as captured
    }

    function addHandler(el, name, value, modifiers, important, warn, range, dynamic) {
      modifiers = modifiers || emptyObject; // warn prevent and passive modifier

      /* istanbul ignore if */

      if (warn && modifiers.prevent && modifiers.passive) {
        warn('passive and prevent can\'t be used together. ' + 'Passive handler can\'t prevent default event.', range);
      } // normalize click.right and click.middle since they don't actually fire
      // this is technically browser-specific, but at least for now browsers are
      // the only target envs that have right/middle clicks.


      if (modifiers.right) {
        if (dynamic) {
          name = "(" + name + ")==='click'?'contextmenu':(" + name + ")";
        } else if (name === 'click') {
          name = 'contextmenu';
          delete modifiers.right;
        }
      } else if (modifiers.middle) {
        if (dynamic) {
          name = "(" + name + ")==='click'?'mouseup':(" + name + ")";
        } else if (name === 'click') {
          name = 'mouseup';
        }
      } // check capture modifier


      if (modifiers.capture) {
        delete modifiers.capture;
        name = prependModifierMarker('!', name, dynamic);
      }

      if (modifiers.once) {
        delete modifiers.once;
        name = prependModifierMarker('~', name, dynamic);
      }
      /* istanbul ignore if */


      if (modifiers.passive) {
        delete modifiers.passive;
        name = prependModifierMarker('&', name, dynamic);
      }

      var events;

      if (modifiers.native) {
        delete modifiers.native;
        events = el.nativeEvents || (el.nativeEvents = {});
      } else {
        events = el.events || (el.events = {});
      }

      var newHandler = rangeSetItem({
        value: value.trim(),
        dynamic: dynamic
      }, range);

      if (modifiers !== emptyObject) {
        newHandler.modifiers = modifiers;
      }

      var handlers = events[name];
      /* istanbul ignore if */

      if (Array.isArray(handlers)) {
        important ? handlers.unshift(newHandler) : handlers.push(newHandler);
      } else if (handlers) {
        events[name] = important ? [newHandler, handlers] : [handlers, newHandler];
      } else {
        events[name] = newHandler;
      }

      el.plain = false;
    }

    function getRawBindingAttr(el, name) {
      return el.rawAttrsMap[':' + name] || el.rawAttrsMap['v-bind:' + name] || el.rawAttrsMap[name];
    }

    function getBindingAttr(el, name, getStatic) {
      var dynamicValue = getAndRemoveAttr(el, ':' + name) || getAndRemoveAttr(el, 'v-bind:' + name);

      if (dynamicValue != null) {
        return parseFilters(dynamicValue);
      } else if (getStatic !== false) {
        var staticValue = getAndRemoveAttr(el, name);

        if (staticValue != null) {
          return JSON.stringify(staticValue);
        }
      }
    } // note: this only removes the attr from the Array (attrsList) so that it
    // doesn't get processed by processAttrs.
    // By default it does NOT remove it from the map (attrsMap) because the map is
    // needed during codegen.


    function getAndRemoveAttr(el, name, removeFromMap) {
      var val;

      if ((val = el.attrsMap[name]) != null) {
        var list = el.attrsList;

        for (var i = 0, l = list.length; i < l; i++) {
          if (list[i].name === name) {
            list.splice(i, 1);
            break;
          }
        }
      }

      if (removeFromMap) {
        delete el.attrsMap[name];
      }

      return val;
    }

    function getAndRemoveAttrByRegex(el, name) {
      var list = el.attrsList;

      for (var i = 0, l = list.length; i < l; i++) {
        var attr = list[i];

        if (name.test(attr.name)) {
          list.splice(i, 1);
          return attr;
        }
      }
    }

    function rangeSetItem(item, range) {
      if (range) {
        if (range.start != null) {
          item.start = range.start;
        }

        if (range.end != null) {
          item.end = range.end;
        }
      }

      return item;
    }
    /*  */

    /**
     * Cross-platform code generation for component v-model
     */


    function genComponentModel(el, value, modifiers) {
      var ref = modifiers || {};
      var number = ref.number;
      var trim = ref.trim;
      var baseValueExpression = '$$v';
      var valueExpression = baseValueExpression;

      if (trim) {
        valueExpression = "(typeof " + baseValueExpression + " === 'string'" + "? " + baseValueExpression + ".trim()" + ": " + baseValueExpression + ")";
      }

      if (number) {
        valueExpression = "_n(" + valueExpression + ")";
      }

      var assignment = genAssignmentCode(value, valueExpression);
      el.model = {
        value: "(" + value + ")",
        expression: JSON.stringify(value),
        callback: "function (" + baseValueExpression + ") {" + assignment + "}"
      };
    }
    /**
     * Cross-platform codegen helper for generating v-model value assignment code.
     */


    function genAssignmentCode(value, assignment) {
      var res = parseModel(value);

      if (res.key === null) {
        return value + "=" + assignment;
      } else {
        return "$set(" + res.exp + ", " + res.key + ", " + assignment + ")";
      }
    }
    /**
     * Parse a v-model expression into a base path and a final key segment.
     * Handles both dot-path and possible square brackets.
     *
     * Possible cases:
     *
     * - test
     * - test[key]
     * - test[test1[key]]
     * - test["a"][key]
     * - xxx.test[a[a].test1[key]]
     * - test.xxx.a["asa"][test1[key]]
     *
     */


    var len, str, chr, index$1, expressionPos, expressionEndPos;

    function parseModel(val) {
      // Fix https://github.com/vuejs/vue/pull/7730
      // allow v-model="obj.val " (trailing whitespace)
      val = val.trim();
      len = val.length;

      if (val.indexOf('[') < 0 || val.lastIndexOf(']') < len - 1) {
        index$1 = val.lastIndexOf('.');

        if (index$1 > -1) {
          return {
            exp: val.slice(0, index$1),
            key: '"' + val.slice(index$1 + 1) + '"'
          };
        } else {
          return {
            exp: val,
            key: null
          };
        }
      }

      str = val;
      index$1 = expressionPos = expressionEndPos = 0;

      while (!eof()) {
        chr = next();
        /* istanbul ignore if */

        if (isStringStart(chr)) {
          parseString(chr);
        } else if (chr === 0x5B) {
          parseBracket(chr);
        }
      }

      return {
        exp: val.slice(0, expressionPos),
        key: val.slice(expressionPos + 1, expressionEndPos)
      };
    }

    function next() {
      return str.charCodeAt(++index$1);
    }

    function eof() {
      return index$1 >= len;
    }

    function isStringStart(chr) {
      return chr === 0x22 || chr === 0x27;
    }

    function parseBracket(chr) {
      var inBracket = 1;
      expressionPos = index$1;

      while (!eof()) {
        chr = next();

        if (isStringStart(chr)) {
          parseString(chr);
          continue;
        }

        if (chr === 0x5B) {
          inBracket++;
        }

        if (chr === 0x5D) {
          inBracket--;
        }

        if (inBracket === 0) {
          expressionEndPos = index$1;
          break;
        }
      }
    }

    function parseString(chr) {
      var stringQuote = chr;

      while (!eof()) {
        chr = next();

        if (chr === stringQuote) {
          break;
        }
      }
    }
    /*  */


    var warn$1; // in some cases, the event used has to be determined at runtime
    // so we used some reserved tokens during compile.

    var RANGE_TOKEN = '__r';
    var CHECKBOX_RADIO_TOKEN = '__c';

    function model(el, dir, _warn) {
      warn$1 = _warn;
      var value = dir.value;
      var modifiers = dir.modifiers;
      var tag = el.tag;
      var type = el.attrsMap.type;
      {
        // inputs with type="file" are read only and setting the input's
        // value will throw an error.
        if (tag === 'input' && type === 'file') {
          warn$1("<" + el.tag + " v-model=\"" + value + "\" type=\"file\">:\n" + "File inputs are read only. Use a v-on:change listener instead.", el.rawAttrsMap['v-model']);
        }
      }

      if (el.component) {
        genComponentModel(el, value, modifiers); // component v-model doesn't need extra runtime

        return false;
      } else if (tag === 'select') {
        genSelect(el, value, modifiers);
      } else if (tag === 'input' && type === 'checkbox') {
        genCheckboxModel(el, value, modifiers);
      } else if (tag === 'input' && type === 'radio') {
        genRadioModel(el, value, modifiers);
      } else if (tag === 'input' || tag === 'textarea') {
        genDefaultModel(el, value, modifiers);
      } else if (!config.isReservedTag(tag)) {
        genComponentModel(el, value, modifiers); // component v-model doesn't need extra runtime

        return false;
      } else {
        warn$1("<" + el.tag + " v-model=\"" + value + "\">: " + "v-model is not supported on this element type. " + 'If you are working with contenteditable, it\'s recommended to ' + 'wrap a library dedicated for that purpose inside a custom component.', el.rawAttrsMap['v-model']);
      } // ensure runtime directive metadata


      return true;
    }

    function genCheckboxModel(el, value, modifiers) {
      var number = modifiers && modifiers.number;
      var valueBinding = getBindingAttr(el, 'value') || 'null';
      var trueValueBinding = getBindingAttr(el, 'true-value') || 'true';
      var falseValueBinding = getBindingAttr(el, 'false-value') || 'false';
      addProp(el, 'checked', "Array.isArray(" + value + ")" + "?_i(" + value + "," + valueBinding + ")>-1" + (trueValueBinding === 'true' ? ":(" + value + ")" : ":_q(" + value + "," + trueValueBinding + ")"));
      addHandler(el, 'change', "var $$a=" + value + "," + '$$el=$event.target,' + "$$c=$$el.checked?(" + trueValueBinding + "):(" + falseValueBinding + ");" + 'if(Array.isArray($$a)){' + "var $$v=" + (number ? '_n(' + valueBinding + ')' : valueBinding) + "," + '$$i=_i($$a,$$v);' + "if($$el.checked){$$i<0&&(" + genAssignmentCode(value, '$$a.concat([$$v])') + ")}" + "else{$$i>-1&&(" + genAssignmentCode(value, '$$a.slice(0,$$i).concat($$a.slice($$i+1))') + ")}" + "}else{" + genAssignmentCode(value, '$$c') + "}", null, true);
    }

    function genRadioModel(el, value, modifiers) {
      var number = modifiers && modifiers.number;
      var valueBinding = getBindingAttr(el, 'value') || 'null';
      valueBinding = number ? "_n(" + valueBinding + ")" : valueBinding;
      addProp(el, 'checked', "_q(" + value + "," + valueBinding + ")");
      addHandler(el, 'change', genAssignmentCode(value, valueBinding), null, true);
    }

    function genSelect(el, value, modifiers) {
      var number = modifiers && modifiers.number;
      var selectedVal = "Array.prototype.filter" + ".call($event.target.options,function(o){return o.selected})" + ".map(function(o){var val = \"_value\" in o ? o._value : o.value;" + "return " + (number ? '_n(val)' : 'val') + "})";
      var assignment = '$event.target.multiple ? $$selectedVal : $$selectedVal[0]';
      var code = "var $$selectedVal = " + selectedVal + ";";
      code = code + " " + genAssignmentCode(value, assignment);
      addHandler(el, 'change', code, null, true);
    }

    function genDefaultModel(el, value, modifiers) {
      var type = el.attrsMap.type; // warn if v-bind:value conflicts with v-model
      // except for inputs with v-bind:type

      {
        var value$1 = el.attrsMap['v-bind:value'] || el.attrsMap[':value'];
        var typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type'];

        if (value$1 && !typeBinding) {
          var binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value';
          warn$1(binding + "=\"" + value$1 + "\" conflicts with v-model on the same element " + 'because the latter already expands to a value binding internally', el.rawAttrsMap[binding]);
        }
      }
      var ref = modifiers || {};
      var lazy = ref.lazy;
      var number = ref.number;
      var trim = ref.trim;
      var needCompositionGuard = !lazy && type !== 'range';
      var event = lazy ? 'change' : type === 'range' ? RANGE_TOKEN : 'input';
      var valueExpression = '$event.target.value';

      if (trim) {
        valueExpression = "$event.target.value.trim()";
      }

      if (number) {
        valueExpression = "_n(" + valueExpression + ")";
      }

      var code = genAssignmentCode(value, valueExpression);

      if (needCompositionGuard) {
        code = "if($event.target.composing)return;" + code;
      }

      addProp(el, 'value', "(" + value + ")");
      addHandler(el, event, code, null, true);

      if (trim || number) {
        addHandler(el, 'blur', '$forceUpdate()');
      }
    }
    /*  */
    // normalize v-model event tokens that can only be determined at runtime.
    // it's important to place the event as the first in the array because
    // the whole point is ensuring the v-model callback gets called before
    // user-attached handlers.


    function normalizeEvents(on) {
      /* istanbul ignore if */
      if (isDef(on[RANGE_TOKEN])) {
        // IE input[type=range] only supports `change` event
        var event = isIE ? 'change' : 'input';
        on[event] = [].concat(on[RANGE_TOKEN], on[event] || []);
        delete on[RANGE_TOKEN];
      } // This was originally intended to fix #4521 but no longer necessary
      // after 2.5. Keeping it for backwards compat with generated code from < 2.4

      /* istanbul ignore if */


      if (isDef(on[CHECKBOX_RADIO_TOKEN])) {
        on.change = [].concat(on[CHECKBOX_RADIO_TOKEN], on.change || []);
        delete on[CHECKBOX_RADIO_TOKEN];
      }
    }

    var target$1;

    function createOnceHandler$1(event, handler, capture) {
      var _target = target$1; // save current target element in closure

      return function onceHandler() {
        var res = handler.apply(null, arguments);

        if (res !== null) {
          remove$2(event, onceHandler, capture, _target);
        }
      };
    } // #9446: Firefox <= 53 (in particular, ESR 52) has incorrect Event.timeStamp
    // implementation and does not fire microtasks in between event propagation, so
    // safe to exclude.


    var useMicrotaskFix = isUsingMicroTask && !(isFF && Number(isFF[1]) <= 53);

    function add$1(name, handler, capture, passive) {
      // async edge case #6566: inner click event triggers patch, event handler
      // attached to outer element during patch, and triggered again. This
      // happens because browsers fire microtask ticks between event propagation.
      // the solution is simple: we save the timestamp when a handler is attached,
      // and the handler would only fire if the event passed to it was fired
      // AFTER it was attached.
      if (useMicrotaskFix) {
        var attachedTimestamp = currentFlushTimestamp;
        var original = handler;

        handler = original._wrapper = function (e) {
          if ( // no bubbling, should always fire.
          // this is just a safety net in case event.timeStamp is unreliable in
          // certain weird environments...
          e.target === e.currentTarget || // event is fired after handler attachment
          e.timeStamp >= attachedTimestamp || // bail for environments that have buggy event.timeStamp implementations
          // #9462 iOS 9 bug: event.timeStamp is 0 after history.pushState
          // #9681 QtWebEngine event.timeStamp is negative value
          e.timeStamp <= 0 || // #9448 bail if event is fired in another document in a multi-page
          // electron/nw.js app, since event.timeStamp will be using a different
          // starting reference
          e.target.ownerDocument !== document) {
            return original.apply(this, arguments);
          }
        };
      }

      target$1.addEventListener(name, handler, supportsPassive ? {
        capture: capture,
        passive: passive
      } : capture);
    }

    function remove$2(name, handler, capture, _target) {
      (_target || target$1).removeEventListener(name, handler._wrapper || handler, capture);
    }

    function updateDOMListeners(oldVnode, vnode) {
      if (isUndef(oldVnode.data.on) && isUndef(vnode.data.on)) {
        return;
      }

      var on = vnode.data.on || {};
      var oldOn = oldVnode.data.on || {};
      target$1 = vnode.elm;
      normalizeEvents(on);
      updateListeners(on, oldOn, add$1, remove$2, createOnceHandler$1, vnode.context);
      target$1 = undefined;
    }

    var events = {
      create: updateDOMListeners,
      update: updateDOMListeners
    };
    /*  */

    var svgContainer;

    function updateDOMProps(oldVnode, vnode) {
      if (isUndef(oldVnode.data.domProps) && isUndef(vnode.data.domProps)) {
        return;
      }

      var key, cur;
      var elm = vnode.elm;
      var oldProps = oldVnode.data.domProps || {};
      var props = vnode.data.domProps || {}; // clone observed objects, as the user probably wants to mutate it

      if (isDef(props.__ob__)) {
        props = vnode.data.domProps = extend({}, props);
      }

      for (key in oldProps) {
        if (!(key in props)) {
          elm[key] = '';
        }
      }

      for (key in props) {
        cur = props[key]; // ignore children if the node has textContent or innerHTML,
        // as these will throw away existing DOM nodes and cause removal errors
        // on subsequent patches (#3360)

        if (key === 'textContent' || key === 'innerHTML') {
          if (vnode.children) {
            vnode.children.length = 0;
          }

          if (cur === oldProps[key]) {
            continue;
          } // #6601 work around Chrome version <= 55 bug where single textNode
          // replaced by innerHTML/textContent retains its parentNode property


          if (elm.childNodes.length === 1) {
            elm.removeChild(elm.childNodes[0]);
          }
        }

        if (key === 'value' && elm.tagName !== 'PROGRESS') {
          // store value as _value as well since
          // non-string values will be stringified
          elm._value = cur; // avoid resetting cursor position when value is the same

          var strCur = isUndef(cur) ? '' : String(cur);

          if (shouldUpdateValue(elm, strCur)) {
            elm.value = strCur;
          }
        } else if (key === 'innerHTML' && isSVG(elm.tagName) && isUndef(elm.innerHTML)) {
          // IE doesn't support innerHTML for SVG elements
          svgContainer = svgContainer || document.createElement('div');
          svgContainer.innerHTML = "<svg>" + cur + "</svg>";
          var svg = svgContainer.firstChild;

          while (elm.firstChild) {
            elm.removeChild(elm.firstChild);
          }

          while (svg.firstChild) {
            elm.appendChild(svg.firstChild);
          }
        } else if ( // skip the update if old and new VDOM state is the same.
        // `value` is handled separately because the DOM value may be temporarily
        // out of sync with VDOM state due to focus, composition and modifiers.
        // This  #4521 by skipping the unnecessary `checked` update.
        cur !== oldProps[key]) {
          // some property updates can throw
          // e.g. `value` on <progress> w/ non-finite value
          try {
            elm[key] = cur;
          } catch (e) {}
        }
      }
    } // check platforms/web/util/attrs.js acceptValue


    function shouldUpdateValue(elm, checkVal) {
      return !elm.composing && (elm.tagName === 'OPTION' || isNotInFocusAndDirty(elm, checkVal) || isDirtyWithModifiers(elm, checkVal));
    }

    function isNotInFocusAndDirty(elm, checkVal) {
      // return true when textbox (.number and .trim) loses focus and its value is
      // not equal to the updated value
      var notInFocus = true; // #6157
      // work around IE bug when accessing document.activeElement in an iframe

      try {
        notInFocus = document.activeElement !== elm;
      } catch (e) {}

      return notInFocus && elm.value !== checkVal;
    }

    function isDirtyWithModifiers(elm, newVal) {
      var value = elm.value;
      var modifiers = elm._vModifiers; // injected by v-model runtime

      if (isDef(modifiers)) {
        if (modifiers.number) {
          return toNumber(value) !== toNumber(newVal);
        }

        if (modifiers.trim) {
          return value.trim() !== newVal.trim();
        }
      }

      return value !== newVal;
    }

    var domProps = {
      create: updateDOMProps,
      update: updateDOMProps
    };
    /*  */

    var parseStyleText = cached(function (cssText) {
      var res = {};
      var listDelimiter = /;(?![^(]*\))/g;
      var propertyDelimiter = /:(.+)/;
      cssText.split(listDelimiter).forEach(function (item) {
        if (item) {
          var tmp = item.split(propertyDelimiter);
          tmp.length > 1 && (res[tmp[0].trim()] = tmp[1].trim());
        }
      });
      return res;
    }); // merge static and dynamic style data on the same vnode

    function normalizeStyleData(data) {
      var style = normalizeStyleBinding(data.style); // static style is pre-processed into an object during compilation
      // and is always a fresh object, so it's safe to merge into it

      return data.staticStyle ? extend(data.staticStyle, style) : style;
    } // normalize possible array / string values into Object


    function normalizeStyleBinding(bindingStyle) {
      if (Array.isArray(bindingStyle)) {
        return toObject(bindingStyle);
      }

      if (typeof bindingStyle === 'string') {
        return parseStyleText(bindingStyle);
      }

      return bindingStyle;
    }
    /**
     * parent component style should be after child's
     * so that parent component's style could override it
     */


    function getStyle(vnode, checkChild) {
      var res = {};
      var styleData;

      if (checkChild) {
        var childNode = vnode;

        while (childNode.componentInstance) {
          childNode = childNode.componentInstance._vnode;

          if (childNode && childNode.data && (styleData = normalizeStyleData(childNode.data))) {
            extend(res, styleData);
          }
        }
      }

      if (styleData = normalizeStyleData(vnode.data)) {
        extend(res, styleData);
      }

      var parentNode = vnode;

      while (parentNode = parentNode.parent) {
        if (parentNode.data && (styleData = normalizeStyleData(parentNode.data))) {
          extend(res, styleData);
        }
      }

      return res;
    }
    /*  */


    var cssVarRE = /^--/;
    var importantRE = /\s*!important$/;

    var setProp = function setProp(el, name, val) {
      /* istanbul ignore if */
      if (cssVarRE.test(name)) {
        el.style.setProperty(name, val);
      } else if (importantRE.test(val)) {
        el.style.setProperty(hyphenate(name), val.replace(importantRE, ''), 'important');
      } else {
        var normalizedName = normalize(name);

        if (Array.isArray(val)) {
          // Support values array created by autoprefixer, e.g.
          // {display: ["-webkit-box", "-ms-flexbox", "flex"]}
          // Set them one by one, and the browser will only set those it can recognize
          for (var i = 0, len = val.length; i < len; i++) {
            el.style[normalizedName] = val[i];
          }
        } else {
          el.style[normalizedName] = val;
        }
      }
    };

    var vendorNames = ['Webkit', 'Moz', 'ms'];
    var emptyStyle;
    var normalize = cached(function (prop) {
      emptyStyle = emptyStyle || document.createElement('div').style;
      prop = camelize(prop);

      if (prop !== 'filter' && prop in emptyStyle) {
        return prop;
      }

      var capName = prop.charAt(0).toUpperCase() + prop.slice(1);

      for (var i = 0; i < vendorNames.length; i++) {
        var name = vendorNames[i] + capName;

        if (name in emptyStyle) {
          return name;
        }
      }
    });

    function updateStyle(oldVnode, vnode) {
      var data = vnode.data;
      var oldData = oldVnode.data;

      if (isUndef(data.staticStyle) && isUndef(data.style) && isUndef(oldData.staticStyle) && isUndef(oldData.style)) {
        return;
      }

      var cur, name;
      var el = vnode.elm;
      var oldStaticStyle = oldData.staticStyle;
      var oldStyleBinding = oldData.normalizedStyle || oldData.style || {}; // if static style exists, stylebinding already merged into it when doing normalizeStyleData

      var oldStyle = oldStaticStyle || oldStyleBinding;
      var style = normalizeStyleBinding(vnode.data.style) || {}; // store normalized style under a different key for next diff
      // make sure to clone it if it's reactive, since the user likely wants
      // to mutate it.

      vnode.data.normalizedStyle = isDef(style.__ob__) ? extend({}, style) : style;
      var newStyle = getStyle(vnode, true);

      for (name in oldStyle) {
        if (isUndef(newStyle[name])) {
          setProp(el, name, '');
        }
      }

      for (name in newStyle) {
        cur = newStyle[name];

        if (cur !== oldStyle[name]) {
          // ie9 setting to null has no effect, must use empty string
          setProp(el, name, cur == null ? '' : cur);
        }
      }
    }

    var style = {
      create: updateStyle,
      update: updateStyle
    };
    /*  */

    var whitespaceRE = /\s+/;
    /**
     * Add class with compatibility for SVG since classList is not supported on
     * SVG elements in IE
     */

    function addClass(el, cls) {
      /* istanbul ignore if */
      if (!cls || !(cls = cls.trim())) {
        return;
      }
      /* istanbul ignore else */


      if (el.classList) {
        if (cls.indexOf(' ') > -1) {
          cls.split(whitespaceRE).forEach(function (c) {
            return el.classList.add(c);
          });
        } else {
          el.classList.add(cls);
        }
      } else {
        var cur = " " + (el.getAttribute('class') || '') + " ";

        if (cur.indexOf(' ' + cls + ' ') < 0) {
          el.setAttribute('class', (cur + cls).trim());
        }
      }
    }
    /**
     * Remove class with compatibility for SVG since classList is not supported on
     * SVG elements in IE
     */


    function removeClass(el, cls) {
      /* istanbul ignore if */
      if (!cls || !(cls = cls.trim())) {
        return;
      }
      /* istanbul ignore else */


      if (el.classList) {
        if (cls.indexOf(' ') > -1) {
          cls.split(whitespaceRE).forEach(function (c) {
            return el.classList.remove(c);
          });
        } else {
          el.classList.remove(cls);
        }

        if (!el.classList.length) {
          el.removeAttribute('class');
        }
      } else {
        var cur = " " + (el.getAttribute('class') || '') + " ";
        var tar = ' ' + cls + ' ';

        while (cur.indexOf(tar) >= 0) {
          cur = cur.replace(tar, ' ');
        }

        cur = cur.trim();

        if (cur) {
          el.setAttribute('class', cur);
        } else {
          el.removeAttribute('class');
        }
      }
    }
    /*  */


    function resolveTransition(def$$1) {
      if (!def$$1) {
        return;
      }
      /* istanbul ignore else */


      if (babelHelpers.typeof(def$$1) === 'object') {
        var res = {};

        if (def$$1.css !== false) {
          extend(res, autoCssTransition(def$$1.name || 'v'));
        }

        extend(res, def$$1);
        return res;
      } else if (typeof def$$1 === 'string') {
        return autoCssTransition(def$$1);
      }
    }

    var autoCssTransition = cached(function (name) {
      return {
        enterClass: name + "-enter",
        enterToClass: name + "-enter-to",
        enterActiveClass: name + "-enter-active",
        leaveClass: name + "-leave",
        leaveToClass: name + "-leave-to",
        leaveActiveClass: name + "-leave-active"
      };
    });
    var hasTransition = inBrowser && !isIE9;
    var TRANSITION = 'transition';
    var ANIMATION = 'animation'; // Transition property/event sniffing

    var transitionProp = 'transition';
    var transitionEndEvent = 'transitionend';
    var animationProp = 'animation';
    var animationEndEvent = 'animationend';

    if (hasTransition) {
      /* istanbul ignore if */
      if (window.ontransitionend === undefined && window.onwebkittransitionend !== undefined) {
        transitionProp = 'WebkitTransition';
        transitionEndEvent = 'webkitTransitionEnd';
      }

      if (window.onanimationend === undefined && window.onwebkitanimationend !== undefined) {
        animationProp = 'WebkitAnimation';
        animationEndEvent = 'webkitAnimationEnd';
      }
    } // binding to window is necessary to make hot reload work in IE in strict mode


    var raf = inBrowser ? window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : setTimeout :
    /* istanbul ignore next */
    function (fn) {
      return fn();
    };

    function nextFrame(fn) {
      raf(function () {
        raf(fn);
      });
    }

    function addTransitionClass(el, cls) {
      var transitionClasses = el._transitionClasses || (el._transitionClasses = []);

      if (transitionClasses.indexOf(cls) < 0) {
        transitionClasses.push(cls);
        addClass(el, cls);
      }
    }

    function removeTransitionClass(el, cls) {
      if (el._transitionClasses) {
        remove(el._transitionClasses, cls);
      }

      removeClass(el, cls);
    }

    function whenTransitionEnds(el, expectedType, cb) {
      var ref = getTransitionInfo(el, expectedType);
      var type = ref.type;
      var timeout = ref.timeout;
      var propCount = ref.propCount;

      if (!type) {
        return cb();
      }

      var event = type === TRANSITION ? transitionEndEvent : animationEndEvent;
      var ended = 0;

      var end = function end() {
        el.removeEventListener(event, onEnd);
        cb();
      };

      var onEnd = function onEnd(e) {
        if (e.target === el) {
          if (++ended >= propCount) {
            end();
          }
        }
      };

      setTimeout(function () {
        if (ended < propCount) {
          end();
        }
      }, timeout + 1);
      el.addEventListener(event, onEnd);
    }

    var transformRE = /\b(transform|all)(,|$)/;

    function getTransitionInfo(el, expectedType) {
      var styles = window.getComputedStyle(el); // JSDOM may return undefined for transition properties

      var transitionDelays = (styles[transitionProp + 'Delay'] || '').split(', ');
      var transitionDurations = (styles[transitionProp + 'Duration'] || '').split(', ');
      var transitionTimeout = getTimeout(transitionDelays, transitionDurations);
      var animationDelays = (styles[animationProp + 'Delay'] || '').split(', ');
      var animationDurations = (styles[animationProp + 'Duration'] || '').split(', ');
      var animationTimeout = getTimeout(animationDelays, animationDurations);
      var type;
      var timeout = 0;
      var propCount = 0;
      /* istanbul ignore if */

      if (expectedType === TRANSITION) {
        if (transitionTimeout > 0) {
          type = TRANSITION;
          timeout = transitionTimeout;
          propCount = transitionDurations.length;
        }
      } else if (expectedType === ANIMATION) {
        if (animationTimeout > 0) {
          type = ANIMATION;
          timeout = animationTimeout;
          propCount = animationDurations.length;
        }
      } else {
        timeout = Math.max(transitionTimeout, animationTimeout);
        type = timeout > 0 ? transitionTimeout > animationTimeout ? TRANSITION : ANIMATION : null;
        propCount = type ? type === TRANSITION ? transitionDurations.length : animationDurations.length : 0;
      }

      var hasTransform = type === TRANSITION && transformRE.test(styles[transitionProp + 'Property']);
      return {
        type: type,
        timeout: timeout,
        propCount: propCount,
        hasTransform: hasTransform
      };
    }

    function getTimeout(delays, durations) {
      /* istanbul ignore next */
      while (delays.length < durations.length) {
        delays = delays.concat(delays);
      }

      return Math.max.apply(null, durations.map(function (d, i) {
        return toMs(d) + toMs(delays[i]);
      }));
    } // Old versions of Chromium (below 61.0.3163.100) formats floating pointer numbers
    // in a locale-dependent way, using a comma instead of a dot.
    // If comma is not replaced with a dot, the input will be rounded down (i.e. acting
    // as a floor function) causing unexpected behaviors


    function toMs(s) {
      return Number(s.slice(0, -1).replace(',', '.')) * 1000;
    }
    /*  */


    function enter(vnode, toggleDisplay) {
      var el = vnode.elm; // call leave callback now

      if (isDef(el._leaveCb)) {
        el._leaveCb.cancelled = true;

        el._leaveCb();
      }

      var data = resolveTransition(vnode.data.transition);

      if (isUndef(data)) {
        return;
      }
      /* istanbul ignore if */


      if (isDef(el._enterCb) || el.nodeType !== 1) {
        return;
      }

      var css = data.css;
      var type = data.type;
      var enterClass = data.enterClass;
      var enterToClass = data.enterToClass;
      var enterActiveClass = data.enterActiveClass;
      var appearClass = data.appearClass;
      var appearToClass = data.appearToClass;
      var appearActiveClass = data.appearActiveClass;
      var beforeEnter = data.beforeEnter;
      var enter = data.enter;
      var afterEnter = data.afterEnter;
      var enterCancelled = data.enterCancelled;
      var beforeAppear = data.beforeAppear;
      var appear = data.appear;
      var afterAppear = data.afterAppear;
      var appearCancelled = data.appearCancelled;
      var duration = data.duration; // activeInstance will always be the <transition> component managing this
      // transition. One edge case to check is when the <transition> is placed
      // as the root node of a child component. In that case we need to check
      // <transition>'s parent for appear check.

      var context = activeInstance;
      var transitionNode = activeInstance.$vnode;

      while (transitionNode && transitionNode.parent) {
        context = transitionNode.context;
        transitionNode = transitionNode.parent;
      }

      var isAppear = !context._isMounted || !vnode.isRootInsert;

      if (isAppear && !appear && appear !== '') {
        return;
      }

      var startClass = isAppear && appearClass ? appearClass : enterClass;
      var activeClass = isAppear && appearActiveClass ? appearActiveClass : enterActiveClass;
      var toClass = isAppear && appearToClass ? appearToClass : enterToClass;
      var beforeEnterHook = isAppear ? beforeAppear || beforeEnter : beforeEnter;
      var enterHook = isAppear ? typeof appear === 'function' ? appear : enter : enter;
      var afterEnterHook = isAppear ? afterAppear || afterEnter : afterEnter;
      var enterCancelledHook = isAppear ? appearCancelled || enterCancelled : enterCancelled;
      var explicitEnterDuration = toNumber(isObject(duration) ? duration.enter : duration);

      if (explicitEnterDuration != null) {
        checkDuration(explicitEnterDuration, 'enter', vnode);
      }

      var expectsCSS = css !== false && !isIE9;
      var userWantsControl = getHookArgumentsLength(enterHook);
      var cb = el._enterCb = once(function () {
        if (expectsCSS) {
          removeTransitionClass(el, toClass);
          removeTransitionClass(el, activeClass);
        }

        if (cb.cancelled) {
          if (expectsCSS) {
            removeTransitionClass(el, startClass);
          }

          enterCancelledHook && enterCancelledHook(el);
        } else {
          afterEnterHook && afterEnterHook(el);
        }

        el._enterCb = null;
      });

      if (!vnode.data.show) {
        // remove pending leave element on enter by injecting an insert hook
        mergeVNodeHook(vnode, 'insert', function () {
          var parent = el.parentNode;
          var pendingNode = parent && parent._pending && parent._pending[vnode.key];

          if (pendingNode && pendingNode.tag === vnode.tag && pendingNode.elm._leaveCb) {
            pendingNode.elm._leaveCb();
          }

          enterHook && enterHook(el, cb);
        });
      } // start enter transition


      beforeEnterHook && beforeEnterHook(el);

      if (expectsCSS) {
        addTransitionClass(el, startClass);
        addTransitionClass(el, activeClass);
        nextFrame(function () {
          removeTransitionClass(el, startClass);

          if (!cb.cancelled) {
            addTransitionClass(el, toClass);

            if (!userWantsControl) {
              if (isValidDuration(explicitEnterDuration)) {
                setTimeout(cb, explicitEnterDuration);
              } else {
                whenTransitionEnds(el, type, cb);
              }
            }
          }
        });
      }

      if (vnode.data.show) {
        toggleDisplay && toggleDisplay();
        enterHook && enterHook(el, cb);
      }

      if (!expectsCSS && !userWantsControl) {
        cb();
      }
    }

    function leave(vnode, rm) {
      var el = vnode.elm; // call enter callback now

      if (isDef(el._enterCb)) {
        el._enterCb.cancelled = true;

        el._enterCb();
      }

      var data = resolveTransition(vnode.data.transition);

      if (isUndef(data) || el.nodeType !== 1) {
        return rm();
      }
      /* istanbul ignore if */


      if (isDef(el._leaveCb)) {
        return;
      }

      var css = data.css;
      var type = data.type;
      var leaveClass = data.leaveClass;
      var leaveToClass = data.leaveToClass;
      var leaveActiveClass = data.leaveActiveClass;
      var beforeLeave = data.beforeLeave;
      var leave = data.leave;
      var afterLeave = data.afterLeave;
      var leaveCancelled = data.leaveCancelled;
      var delayLeave = data.delayLeave;
      var duration = data.duration;
      var expectsCSS = css !== false && !isIE9;
      var userWantsControl = getHookArgumentsLength(leave);
      var explicitLeaveDuration = toNumber(isObject(duration) ? duration.leave : duration);

      if (isDef(explicitLeaveDuration)) {
        checkDuration(explicitLeaveDuration, 'leave', vnode);
      }

      var cb = el._leaveCb = once(function () {
        if (el.parentNode && el.parentNode._pending) {
          el.parentNode._pending[vnode.key] = null;
        }

        if (expectsCSS) {
          removeTransitionClass(el, leaveToClass);
          removeTransitionClass(el, leaveActiveClass);
        }

        if (cb.cancelled) {
          if (expectsCSS) {
            removeTransitionClass(el, leaveClass);
          }

          leaveCancelled && leaveCancelled(el);
        } else {
          rm();
          afterLeave && afterLeave(el);
        }

        el._leaveCb = null;
      });

      if (delayLeave) {
        delayLeave(performLeave);
      } else {
        performLeave();
      }

      function performLeave() {
        // the delayed leave may have already been cancelled
        if (cb.cancelled) {
          return;
        } // record leaving element


        if (!vnode.data.show && el.parentNode) {
          (el.parentNode._pending || (el.parentNode._pending = {}))[vnode.key] = vnode;
        }

        beforeLeave && beforeLeave(el);

        if (expectsCSS) {
          addTransitionClass(el, leaveClass);
          addTransitionClass(el, leaveActiveClass);
          nextFrame(function () {
            removeTransitionClass(el, leaveClass);

            if (!cb.cancelled) {
              addTransitionClass(el, leaveToClass);

              if (!userWantsControl) {
                if (isValidDuration(explicitLeaveDuration)) {
                  setTimeout(cb, explicitLeaveDuration);
                } else {
                  whenTransitionEnds(el, type, cb);
                }
              }
            }
          });
        }

        leave && leave(el, cb);

        if (!expectsCSS && !userWantsControl) {
          cb();
        }
      }
    } // only used in dev mode


    function checkDuration(val, name, vnode) {
      if (typeof val !== 'number') {
        warn("<transition> explicit " + name + " duration is not a valid number - " + "got " + JSON.stringify(val) + ".", vnode.context);
      } else if (isNaN(val)) {
        warn("<transition> explicit " + name + " duration is NaN - " + 'the duration expression might be incorrect.', vnode.context);
      }
    }

    function isValidDuration(val) {
      return typeof val === 'number' && !isNaN(val);
    }
    /**
     * Normalize a transition hook's argument length. The hook may be:
     * - a merged hook (invoker) with the original in .fns
     * - a wrapped component method (check ._length)
     * - a plain function (.length)
     */


    function getHookArgumentsLength(fn) {
      if (isUndef(fn)) {
        return false;
      }

      var invokerFns = fn.fns;

      if (isDef(invokerFns)) {
        // invoker
        return getHookArgumentsLength(Array.isArray(invokerFns) ? invokerFns[0] : invokerFns);
      } else {
        return (fn._length || fn.length) > 1;
      }
    }

    function _enter(_, vnode) {
      if (vnode.data.show !== true) {
        enter(vnode);
      }
    }

    var transition = inBrowser ? {
      create: _enter,
      activate: _enter,
      remove: function remove$$1(vnode, rm) {
        /* istanbul ignore else */
        if (vnode.data.show !== true) {
          leave(vnode, rm);
        } else {
          rm();
        }
      }
    } : {};
    var platformModules = [attrs, klass, events, domProps, style, transition];
    /*  */
    // the directive module should be applied last, after all
    // built-in modules have been applied.

    var modules = platformModules.concat(baseModules);
    var patch = createPatchFunction({
      nodeOps: nodeOps,
      modules: modules
    });
    /**
     * Not type checking this file because flow doesn't like attaching
     * properties to Elements.
     */

    /* istanbul ignore if */

    if (isIE9) {
      // http://www.matts411.com/post/internet-explorer-9-oninput/
      document.addEventListener('selectionchange', function () {
        var el = document.activeElement;

        if (el && el.vmodel) {
          trigger(el, 'input');
        }
      });
    }

    var directive = {
      inserted: function inserted(el, binding, vnode, oldVnode) {
        if (vnode.tag === 'select') {
          // #6903
          if (oldVnode.elm && !oldVnode.elm._vOptions) {
            mergeVNodeHook(vnode, 'postpatch', function () {
              directive.componentUpdated(el, binding, vnode);
            });
          } else {
            setSelected(el, binding, vnode.context);
          }

          el._vOptions = [].map.call(el.options, getValue);
        } else if (vnode.tag === 'textarea' || isTextInputType(el.type)) {
          el._vModifiers = binding.modifiers;

          if (!binding.modifiers.lazy) {
            el.addEventListener('compositionstart', onCompositionStart);
            el.addEventListener('compositionend', onCompositionEnd); // Safari < 10.2 & UIWebView doesn't fire compositionend when
            // switching focus before confirming composition choice
            // this also fixes the issue where some browsers e.g. iOS Chrome
            // fires "change" instead of "input" on autocomplete.

            el.addEventListener('change', onCompositionEnd);
            /* istanbul ignore if */

            if (isIE9) {
              el.vmodel = true;
            }
          }
        }
      },
      componentUpdated: function componentUpdated(el, binding, vnode) {
        if (vnode.tag === 'select') {
          setSelected(el, binding, vnode.context); // in case the options rendered by v-for have changed,
          // it's possible that the value is out-of-sync with the rendered options.
          // detect such cases and filter out values that no longer has a matching
          // option in the DOM.

          var prevOptions = el._vOptions;
          var curOptions = el._vOptions = [].map.call(el.options, getValue);

          if (curOptions.some(function (o, i) {
            return !looseEqual(o, prevOptions[i]);
          })) {
            // trigger change event if
            // no matching option found for at least one value
            var needReset = el.multiple ? binding.value.some(function (v) {
              return hasNoMatchingOption(v, curOptions);
            }) : binding.value !== binding.oldValue && hasNoMatchingOption(binding.value, curOptions);

            if (needReset) {
              trigger(el, 'change');
            }
          }
        }
      }
    };

    function setSelected(el, binding, vm) {
      actuallySetSelected(el, binding, vm);
      /* istanbul ignore if */

      if (isIE || isEdge) {
        setTimeout(function () {
          actuallySetSelected(el, binding, vm);
        }, 0);
      }
    }

    function actuallySetSelected(el, binding, vm) {
      var value = binding.value;
      var isMultiple = el.multiple;

      if (isMultiple && !Array.isArray(value)) {
        warn("<select multiple v-model=\"" + binding.expression + "\"> " + "expects an Array value for its binding, but got " + Object.prototype.toString.call(value).slice(8, -1), vm);
        return;
      }

      var selected, option;

      for (var i = 0, l = el.options.length; i < l; i++) {
        option = el.options[i];

        if (isMultiple) {
          selected = looseIndexOf(value, getValue(option)) > -1;

          if (option.selected !== selected) {
            option.selected = selected;
          }
        } else {
          if (looseEqual(getValue(option), value)) {
            if (el.selectedIndex !== i) {
              el.selectedIndex = i;
            }

            return;
          }
        }
      }

      if (!isMultiple) {
        el.selectedIndex = -1;
      }
    }

    function hasNoMatchingOption(value, options) {
      return options.every(function (o) {
        return !looseEqual(o, value);
      });
    }

    function getValue(option) {
      return '_value' in option ? option._value : option.value;
    }

    function onCompositionStart(e) {
      e.target.composing = true;
    }

    function onCompositionEnd(e) {
      // prevent triggering an input event for no reason
      if (!e.target.composing) {
        return;
      }

      e.target.composing = false;
      trigger(e.target, 'input');
    }

    function trigger(el, type) {
      var e = document.createEvent('HTMLEvents');
      e.initEvent(type, true, true);
      el.dispatchEvent(e);
    }
    /*  */
    // recursively search for possible transition defined inside the component root


    function locateNode(vnode) {
      return vnode.componentInstance && (!vnode.data || !vnode.data.transition) ? locateNode(vnode.componentInstance._vnode) : vnode;
    }

    var show = {
      bind: function bind(el, ref, vnode) {
        var value = ref.value;
        vnode = locateNode(vnode);
        var transition$$1 = vnode.data && vnode.data.transition;
        var originalDisplay = el.__vOriginalDisplay = el.style.display === 'none' ? '' : el.style.display;

        if (value && transition$$1) {
          vnode.data.show = true;
          enter(vnode, function () {
            el.style.display = originalDisplay;
          });
        } else {
          el.style.display = value ? originalDisplay : 'none';
        }
      },
      update: function update(el, ref, vnode) {
        var value = ref.value;
        var oldValue = ref.oldValue;
        /* istanbul ignore if */

        if (!value === !oldValue) {
          return;
        }

        vnode = locateNode(vnode);
        var transition$$1 = vnode.data && vnode.data.transition;

        if (transition$$1) {
          vnode.data.show = true;

          if (value) {
            enter(vnode, function () {
              el.style.display = el.__vOriginalDisplay;
            });
          } else {
            leave(vnode, function () {
              el.style.display = 'none';
            });
          }
        } else {
          el.style.display = value ? el.__vOriginalDisplay : 'none';
        }
      },
      unbind: function unbind(el, binding, vnode, oldVnode, isDestroy) {
        if (!isDestroy) {
          el.style.display = el.__vOriginalDisplay;
        }
      }
    };
    var platformDirectives = {
      model: directive,
      show: show
    };
    /*  */

    var transitionProps = {
      name: String,
      appear: Boolean,
      css: Boolean,
      mode: String,
      type: String,
      enterClass: String,
      leaveClass: String,
      enterToClass: String,
      leaveToClass: String,
      enterActiveClass: String,
      leaveActiveClass: String,
      appearClass: String,
      appearActiveClass: String,
      appearToClass: String,
      duration: [Number, String, Object]
    }; // in case the child is also an abstract component, e.g. <keep-alive>
    // we want to recursively retrieve the real component to be rendered

    function getRealChild(vnode) {
      var compOptions = vnode && vnode.componentOptions;

      if (compOptions && compOptions.Ctor.options.abstract) {
        return getRealChild(getFirstComponentChild(compOptions.children));
      } else {
        return vnode;
      }
    }

    function extractTransitionData(comp) {
      var data = {};
      var options = comp.$options; // props

      for (var key in options.propsData) {
        data[key] = comp[key];
      } // events.
      // extract listeners and pass them directly to the transition methods


      var listeners = options._parentListeners;

      for (var key$1 in listeners) {
        data[camelize(key$1)] = listeners[key$1];
      }

      return data;
    }

    function placeholder(h, rawChild) {
      if (/\d-keep-alive$/.test(rawChild.tag)) {
        return h('keep-alive', {
          props: rawChild.componentOptions.propsData
        });
      }
    }

    function hasParentTransition(vnode) {
      while (vnode = vnode.parent) {
        if (vnode.data.transition) {
          return true;
        }
      }
    }

    function isSameChild(child, oldChild) {
      return oldChild.key === child.key && oldChild.tag === child.tag;
    }

    var isNotTextNode = function isNotTextNode(c) {
      return c.tag || isAsyncPlaceholder(c);
    };

    var isVShowDirective = function isVShowDirective(d) {
      return d.name === 'show';
    };

    var Transition = {
      name: 'transition',
      props: transitionProps,
      abstract: true,
      render: function render(h) {
        var this$1 = this;
        var children = this.$slots.default;

        if (!children) {
          return;
        } // filter out text nodes (possible whitespaces)


        children = children.filter(isNotTextNode);
        /* istanbul ignore if */

        if (!children.length) {
          return;
        } // warn multiple elements


        if (children.length > 1) {
          warn('<transition> can only be used on a single element. Use ' + '<transition-group> for lists.', this.$parent);
        }

        var mode = this.mode; // warn invalid mode

        if (mode && mode !== 'in-out' && mode !== 'out-in') {
          warn('invalid <transition> mode: ' + mode, this.$parent);
        }

        var rawChild = children[0]; // if this is a component root node and the component's
        // parent container node also has transition, skip.

        if (hasParentTransition(this.$vnode)) {
          return rawChild;
        } // apply transition data to child
        // use getRealChild() to ignore abstract components e.g. keep-alive


        var child = getRealChild(rawChild);
        /* istanbul ignore if */

        if (!child) {
          return rawChild;
        }

        if (this._leaving) {
          return placeholder(h, rawChild);
        } // ensure a key that is unique to the vnode type and to this transition
        // component instance. This key will be used to remove pending leaving nodes
        // during entering.


        var id = "__transition-" + this._uid + "-";
        child.key = child.key == null ? child.isComment ? id + 'comment' : id + child.tag : isPrimitive(child.key) ? String(child.key).indexOf(id) === 0 ? child.key : id + child.key : child.key;
        var data = (child.data || (child.data = {})).transition = extractTransitionData(this);
        var oldRawChild = this._vnode;
        var oldChild = getRealChild(oldRawChild); // mark v-show
        // so that the transition module can hand over the control to the directive

        if (child.data.directives && child.data.directives.some(isVShowDirective)) {
          child.data.show = true;
        }

        if (oldChild && oldChild.data && !isSameChild(child, oldChild) && !isAsyncPlaceholder(oldChild) && // #6687 component root is a comment node
        !(oldChild.componentInstance && oldChild.componentInstance._vnode.isComment)) {
          // replace old child transition data with fresh one
          // important for dynamic transitions!
          var oldData = oldChild.data.transition = extend({}, data); // handle transition mode

          if (mode === 'out-in') {
            // return placeholder node and queue update when leave finishes
            this._leaving = true;
            mergeVNodeHook(oldData, 'afterLeave', function () {
              this$1._leaving = false;
              this$1.$forceUpdate();
            });
            return placeholder(h, rawChild);
          } else if (mode === 'in-out') {
            if (isAsyncPlaceholder(child)) {
              return oldRawChild;
            }

            var delayedLeave;

            var performLeave = function performLeave() {
              delayedLeave();
            };

            mergeVNodeHook(data, 'afterEnter', performLeave);
            mergeVNodeHook(data, 'enterCancelled', performLeave);
            mergeVNodeHook(oldData, 'delayLeave', function (leave) {
              delayedLeave = leave;
            });
          }
        }

        return rawChild;
      }
    };
    /*  */

    var props = extend({
      tag: String,
      moveClass: String
    }, transitionProps);
    delete props.mode;
    var TransitionGroup = {
      props: props,
      beforeMount: function beforeMount() {
        var this$1 = this;
        var update = this._update;

        this._update = function (vnode, hydrating) {
          var restoreActiveInstance = setActiveInstance(this$1); // force removing pass

          this$1.__patch__(this$1._vnode, this$1.kept, false, // hydrating
          true // removeOnly (!important, avoids unnecessary moves)
          );

          this$1._vnode = this$1.kept;
          restoreActiveInstance();
          update.call(this$1, vnode, hydrating);
        };
      },
      render: function render(h) {
        var tag = this.tag || this.$vnode.data.tag || 'span';
        var map = Object.create(null);
        var prevChildren = this.prevChildren = this.children;
        var rawChildren = this.$slots.default || [];
        var children = this.children = [];
        var transitionData = extractTransitionData(this);

        for (var i = 0; i < rawChildren.length; i++) {
          var c = rawChildren[i];

          if (c.tag) {
            if (c.key != null && String(c.key).indexOf('__vlist') !== 0) {
              children.push(c);
              map[c.key] = c;
              (c.data || (c.data = {})).transition = transitionData;
            } else {
              var opts = c.componentOptions;
              var name = opts ? opts.Ctor.options.name || opts.tag || '' : c.tag;
              warn("<transition-group> children must be keyed: <" + name + ">");
            }
          }
        }

        if (prevChildren) {
          var kept = [];
          var removed = [];

          for (var i$1 = 0; i$1 < prevChildren.length; i$1++) {
            var c$1 = prevChildren[i$1];
            c$1.data.transition = transitionData;
            c$1.data.pos = c$1.elm.getBoundingClientRect();

            if (map[c$1.key]) {
              kept.push(c$1);
            } else {
              removed.push(c$1);
            }
          }

          this.kept = h(tag, null, kept);
          this.removed = removed;
        }

        return h(tag, null, children);
      },
      updated: function updated() {
        var children = this.prevChildren;
        var moveClass = this.moveClass || (this.name || 'v') + '-move';

        if (!children.length || !this.hasMove(children[0].elm, moveClass)) {
          return;
        } // we divide the work into three loops to avoid mixing DOM reads and writes
        // in each iteration - which helps prevent layout thrashing.


        children.forEach(callPendingCbs);
        children.forEach(recordPosition);
        children.forEach(applyTranslation); // force reflow to put everything in position
        // assign to this to avoid being removed in tree-shaking
        // $flow-disable-line

        this._reflow = document.body.offsetHeight;
        children.forEach(function (c) {
          if (c.data.moved) {
            var el = c.elm;
            var s = el.style;
            addTransitionClass(el, moveClass);
            s.transform = s.WebkitTransform = s.transitionDuration = '';
            el.addEventListener(transitionEndEvent, el._moveCb = function cb(e) {
              if (e && e.target !== el) {
                return;
              }

              if (!e || /transform$/.test(e.propertyName)) {
                el.removeEventListener(transitionEndEvent, cb);
                el._moveCb = null;
                removeTransitionClass(el, moveClass);
              }
            });
          }
        });
      },
      methods: {
        hasMove: function hasMove(el, moveClass) {
          /* istanbul ignore if */
          if (!hasTransition) {
            return false;
          }
          /* istanbul ignore if */


          if (this._hasMove) {
            return this._hasMove;
          } // Detect whether an element with the move class applied has
          // CSS transitions. Since the element may be inside an entering
          // transition at this very moment, we make a clone of it and remove
          // all other transition classes applied to ensure only the move class
          // is applied.


          var clone = el.cloneNode();

          if (el._transitionClasses) {
            el._transitionClasses.forEach(function (cls) {
              removeClass(clone, cls);
            });
          }

          addClass(clone, moveClass);
          clone.style.display = 'none';
          this.$el.appendChild(clone);
          var info = getTransitionInfo(clone);
          this.$el.removeChild(clone);
          return this._hasMove = info.hasTransform;
        }
      }
    };

    function callPendingCbs(c) {
      /* istanbul ignore if */
      if (c.elm._moveCb) {
        c.elm._moveCb();
      }
      /* istanbul ignore if */


      if (c.elm._enterCb) {
        c.elm._enterCb();
      }
    }

    function recordPosition(c) {
      c.data.newPos = c.elm.getBoundingClientRect();
    }

    function applyTranslation(c) {
      var oldPos = c.data.pos;
      var newPos = c.data.newPos;
      var dx = oldPos.left - newPos.left;
      var dy = oldPos.top - newPos.top;

      if (dx || dy) {
        c.data.moved = true;
        var s = c.elm.style;
        s.transform = s.WebkitTransform = "translate(" + dx + "px," + dy + "px)";
        s.transitionDuration = '0s';
      }
    }

    var platformComponents = {
      Transition: Transition,
      TransitionGroup: TransitionGroup
    };
    /*  */
    // install platform specific utils

    Vue.config.mustUseProp = mustUseProp;
    Vue.config.isReservedTag = isReservedTag;
    Vue.config.isReservedAttr = isReservedAttr;
    Vue.config.getTagNamespace = getTagNamespace;
    Vue.config.isUnknownElement = isUnknownElement; // install platform runtime directives & components

    extend(Vue.options.directives, platformDirectives);
    extend(Vue.options.components, platformComponents); // install platform patch function

    Vue.prototype.__patch__ = inBrowser ? patch : noop; // public mount method

    Vue.prototype.$mount = function (el, hydrating) {
      el = el && inBrowser ? query(el) : undefined;
      return mountComponent(this, el, hydrating);
    }; // devtools global hook

    /* istanbul ignore next */


    if (inBrowser) {
      setTimeout(function () {
        if (config.devtools) {
          if (devtools) {
            devtools.emit('init', Vue);
          } else {
            console[console.info ? 'info' : 'log']('Download the Vue Devtools extension for a better development experience:\n' + 'https://github.com/vuejs/vue-devtools');
          }
        }

        if (config.productionTip !== false && typeof console !== 'undefined') {
          console[console.info ? 'info' : 'log']("You are running Vue in development mode.\n" + "Make sure to turn on production mode when deploying for production.\n" + "See more tips at https://vuejs.org/guide/deployment.html");
        }
      }, 0);
    }
    /*  */


    var defaultTagRE = /\{\{((?:.|\r?\n)+?)\}\}/g;
    var regexEscapeRE = /[-.*+?^${}()|[\]\/\\]/g;
    var buildRegex = cached(function (delimiters) {
      var open = delimiters[0].replace(regexEscapeRE, '\\$&');
      var close = delimiters[1].replace(regexEscapeRE, '\\$&');
      return new RegExp(open + '((?:.|\\n)+?)' + close, 'g');
    });

    function parseText(text, delimiters) {
      var tagRE = delimiters ? buildRegex(delimiters) : defaultTagRE;

      if (!tagRE.test(text)) {
        return;
      }

      var tokens = [];
      var rawTokens = [];
      var lastIndex = tagRE.lastIndex = 0;
      var match, index, tokenValue;

      while (match = tagRE.exec(text)) {
        index = match.index; // push text token

        if (index > lastIndex) {
          rawTokens.push(tokenValue = text.slice(lastIndex, index));
          tokens.push(JSON.stringify(tokenValue));
        } // tag token


        var exp = parseFilters(match[1].trim());
        tokens.push("_s(" + exp + ")");
        rawTokens.push({
          '@binding': exp
        });
        lastIndex = index + match[0].length;
      }

      if (lastIndex < text.length) {
        rawTokens.push(tokenValue = text.slice(lastIndex));
        tokens.push(JSON.stringify(tokenValue));
      }

      return {
        expression: tokens.join('+'),
        tokens: rawTokens
      };
    }
    /*  */


    function transformNode(el, options) {
      var warn = options.warn || baseWarn;
      var staticClass = getAndRemoveAttr(el, 'class');

      if (staticClass) {
        var res = parseText(staticClass, options.delimiters);

        if (res) {
          warn("class=\"" + staticClass + "\": " + 'Interpolation inside attributes has been removed. ' + 'Use v-bind or the colon shorthand instead. For example, ' + 'instead of <div class="{{ val }}">, use <div :class="val">.', el.rawAttrsMap['class']);
        }
      }

      if (staticClass) {
        el.staticClass = JSON.stringify(staticClass);
      }

      var classBinding = getBindingAttr(el, 'class', false
      /* getStatic */
      );

      if (classBinding) {
        el.classBinding = classBinding;
      }
    }

    function genData(el) {
      var data = '';

      if (el.staticClass) {
        data += "staticClass:" + el.staticClass + ",";
      }

      if (el.classBinding) {
        data += "class:" + el.classBinding + ",";
      }

      return data;
    }

    var klass$1 = {
      staticKeys: ['staticClass'],
      transformNode: transformNode,
      genData: genData
    };
    /*  */

    function transformNode$1(el, options) {
      var warn = options.warn || baseWarn;
      var staticStyle = getAndRemoveAttr(el, 'style');

      if (staticStyle) {
        /* istanbul ignore if */
        {
          var res = parseText(staticStyle, options.delimiters);

          if (res) {
            warn("style=\"" + staticStyle + "\": " + 'Interpolation inside attributes has been removed. ' + 'Use v-bind or the colon shorthand instead. For example, ' + 'instead of <div style="{{ val }}">, use <div :style="val">.', el.rawAttrsMap['style']);
          }
        }
        el.staticStyle = JSON.stringify(parseStyleText(staticStyle));
      }

      var styleBinding = getBindingAttr(el, 'style', false
      /* getStatic */
      );

      if (styleBinding) {
        el.styleBinding = styleBinding;
      }
    }

    function genData$1(el) {
      var data = '';

      if (el.staticStyle) {
        data += "staticStyle:" + el.staticStyle + ",";
      }

      if (el.styleBinding) {
        data += "style:(" + el.styleBinding + "),";
      }

      return data;
    }

    var style$1 = {
      staticKeys: ['staticStyle'],
      transformNode: transformNode$1,
      genData: genData$1
    };
    /*  */

    var decoder;
    var he = {
      decode: function decode(html) {
        decoder = decoder || document.createElement('div');
        decoder.innerHTML = html;
        return decoder.textContent;
      }
    };
    /*  */

    var isUnaryTag = makeMap('area,base,br,col,embed,frame,hr,img,input,isindex,keygen,' + 'link,meta,param,source,track,wbr'); // Elements that you can, intentionally, leave open
    // (and which close themselves)

    var canBeLeftOpenTag = makeMap('colgroup,dd,dt,li,options,p,td,tfoot,th,thead,tr,source'); // HTML5 tags https://html.spec.whatwg.org/multipage/indices.html#elements-3
    // Phrasing Content https://html.spec.whatwg.org/multipage/dom.html#phrasing-content

    var isNonPhrasingTag = makeMap('address,article,aside,base,blockquote,body,caption,col,colgroup,dd,' + 'details,dialog,div,dl,dt,fieldset,figcaption,figure,footer,form,' + 'h1,h2,h3,h4,h5,h6,head,header,hgroup,hr,html,legend,li,menuitem,meta,' + 'optgroup,option,param,rp,rt,source,style,summary,tbody,td,tfoot,th,thead,' + 'title,tr,track');
    /**
     * Not type-checking this file because it's mostly vendor code.
     */
    // Regular Expressions for parsing tags and attributes

    var attribute = /^\s*([^\s"'<>\/=]+)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
    var dynamicArgAttribute = /^\s*((?:v-[\w-]+:|@|:|#)\[[^=]+\][^\s"'<>\/=]*)(?:\s*(=)\s*(?:"([^"]*)"+|'([^']*)'+|([^\s"'=<>`]+)))?/;
    var ncname = "[a-zA-Z_][\\-\\.0-9_a-zA-Z" + unicodeRegExp.source + "]*";
    var qnameCapture = "((?:" + ncname + "\\:)?" + ncname + ")";
    var startTagOpen = new RegExp("^<" + qnameCapture);
    var startTagClose = /^\s*(\/?)>/;
    var endTag = new RegExp("^<\\/" + qnameCapture + "[^>]*>");
    var doctype = /^<!DOCTYPE [^>]+>/i; // #7298: escape - to avoid being passed as HTML comment when inlined in page

    var comment = /^<!\--/;
    var conditionalComment = /^<!\[/; // Special Elements (can contain anything)

    var isPlainTextElement = makeMap('script,style,textarea', true);
    var reCache = {};
    var decodingMap = {
      '&lt;': '<',
      '&gt;': '>',
      '&quot;': '"',
      '&amp;': '&',
      '&#10;': '\n',
      '&#9;': '\t',
      '&#39;': "'"
    };
    var encodedAttr = /&(?:lt|gt|quot|amp|#39);/g;
    var encodedAttrWithNewLines = /&(?:lt|gt|quot|amp|#39|#10|#9);/g; // #5992

    var isIgnoreNewlineTag = makeMap('pre,textarea', true);

    var shouldIgnoreFirstNewline = function shouldIgnoreFirstNewline(tag, html) {
      return tag && isIgnoreNewlineTag(tag) && html[0] === '\n';
    };

    function decodeAttr(value, shouldDecodeNewlines) {
      var re = shouldDecodeNewlines ? encodedAttrWithNewLines : encodedAttr;
      return value.replace(re, function (match) {
        return decodingMap[match];
      });
    }

    function parseHTML(html, options) {
      var stack = [];
      var expectHTML = options.expectHTML;
      var isUnaryTag$$1 = options.isUnaryTag || no;
      var canBeLeftOpenTag$$1 = options.canBeLeftOpenTag || no;
      var index = 0;
      var last, lastTag;

      while (html) {
        last = html; // Make sure we're not in a plaintext content element like script/style

        if (!lastTag || !isPlainTextElement(lastTag)) {
          var textEnd = html.indexOf('<');

          if (textEnd === 0) {
            // Comment:
            if (comment.test(html)) {
              var commentEnd = html.indexOf('-->');

              if (commentEnd >= 0) {
                if (options.shouldKeepComment) {
                  options.comment(html.substring(4, commentEnd), index, index + commentEnd + 3);
                }

                advance(commentEnd + 3);
                continue;
              }
            } // http://en.wikipedia.org/wiki/Conditional_comment#Downlevel-revealed_conditional_comment


            if (conditionalComment.test(html)) {
              var conditionalEnd = html.indexOf(']>');

              if (conditionalEnd >= 0) {
                advance(conditionalEnd + 2);
                continue;
              }
            } // Doctype:


            var doctypeMatch = html.match(doctype);

            if (doctypeMatch) {
              advance(doctypeMatch[0].length);
              continue;
            } // End tag:


            var endTagMatch = html.match(endTag);

            if (endTagMatch) {
              var curIndex = index;
              advance(endTagMatch[0].length);
              parseEndTag(endTagMatch[1], curIndex, index);
              continue;
            } // Start tag:


            var startTagMatch = parseStartTag();

            if (startTagMatch) {
              handleStartTag(startTagMatch);

              if (shouldIgnoreFirstNewline(startTagMatch.tagName, html)) {
                advance(1);
              }

              continue;
            }
          }

          var text = void 0,
              rest = void 0,
              next = void 0;

          if (textEnd >= 0) {
            rest = html.slice(textEnd);

            while (!endTag.test(rest) && !startTagOpen.test(rest) && !comment.test(rest) && !conditionalComment.test(rest)) {
              // < in plain text, be forgiving and treat it as text
              next = rest.indexOf('<', 1);

              if (next < 0) {
                break;
              }

              textEnd += next;
              rest = html.slice(textEnd);
            }

            text = html.substring(0, textEnd);
          }

          if (textEnd < 0) {
            text = html;
          }

          if (text) {
            advance(text.length);
          }

          if (options.chars && text) {
            options.chars(text, index - text.length, index);
          }
        } else {
          var endTagLength = 0;
          var stackedTag = lastTag.toLowerCase();
          var reStackedTag = reCache[stackedTag] || (reCache[stackedTag] = new RegExp('([\\s\\S]*?)(</' + stackedTag + '[^>]*>)', 'i'));
          var rest$1 = html.replace(reStackedTag, function (all, text, endTag) {
            endTagLength = endTag.length;

            if (!isPlainTextElement(stackedTag) && stackedTag !== 'noscript') {
              text = text.replace(/<!\--([\s\S]*?)-->/g, '$1') // #7298
              .replace(/<!\[CDATA\[([\s\S]*?)]]>/g, '$1');
            }

            if (shouldIgnoreFirstNewline(stackedTag, text)) {
              text = text.slice(1);
            }

            if (options.chars) {
              options.chars(text);
            }

            return '';
          });
          index += html.length - rest$1.length;
          html = rest$1;
          parseEndTag(stackedTag, index - endTagLength, index);
        }

        if (html === last) {
          options.chars && options.chars(html);

          if (!stack.length && options.warn) {
            options.warn("Mal-formatted tag at end of template: \"" + html + "\"", {
              start: index + html.length
            });
          }

          break;
        }
      } // Clean up any remaining tags


      parseEndTag();

      function advance(n) {
        index += n;
        html = html.substring(n);
      }

      function parseStartTag() {
        var start = html.match(startTagOpen);

        if (start) {
          var match = {
            tagName: start[1],
            attrs: [],
            start: index
          };
          advance(start[0].length);
          var end, attr;

          while (!(end = html.match(startTagClose)) && (attr = html.match(dynamicArgAttribute) || html.match(attribute))) {
            attr.start = index;
            advance(attr[0].length);
            attr.end = index;
            match.attrs.push(attr);
          }

          if (end) {
            match.unarySlash = end[1];
            advance(end[0].length);
            match.end = index;
            return match;
          }
        }
      }

      function handleStartTag(match) {
        var tagName = match.tagName;
        var unarySlash = match.unarySlash;

        if (expectHTML) {
          if (lastTag === 'p' && isNonPhrasingTag(tagName)) {
            parseEndTag(lastTag);
          }

          if (canBeLeftOpenTag$$1(tagName) && lastTag === tagName) {
            parseEndTag(tagName);
          }
        }

        var unary = isUnaryTag$$1(tagName) || !!unarySlash;
        var l = match.attrs.length;
        var attrs = new Array(l);

        for (var i = 0; i < l; i++) {
          var args = match.attrs[i];
          var value = args[3] || args[4] || args[5] || '';
          var shouldDecodeNewlines = tagName === 'a' && args[1] === 'href' ? options.shouldDecodeNewlinesForHref : options.shouldDecodeNewlines;
          attrs[i] = {
            name: args[1],
            value: decodeAttr(value, shouldDecodeNewlines)
          };

          if (options.outputSourceRange) {
            attrs[i].start = args.start + args[0].match(/^\s*/).length;
            attrs[i].end = args.end;
          }
        }

        if (!unary) {
          stack.push({
            tag: tagName,
            lowerCasedTag: tagName.toLowerCase(),
            attrs: attrs,
            start: match.start,
            end: match.end
          });
          lastTag = tagName;
        }

        if (options.start) {
          options.start(tagName, attrs, unary, match.start, match.end);
        }
      }

      function parseEndTag(tagName, start, end) {
        var pos, lowerCasedTagName;

        if (start == null) {
          start = index;
        }

        if (end == null) {
          end = index;
        } // Find the closest opened tag of the same type


        if (tagName) {
          lowerCasedTagName = tagName.toLowerCase();

          for (pos = stack.length - 1; pos >= 0; pos--) {
            if (stack[pos].lowerCasedTag === lowerCasedTagName) {
              break;
            }
          }
        } else {
          // If no tag name is provided, clean shop
          pos = 0;
        }

        if (pos >= 0) {
          // Close all the open elements, up the stack
          for (var i = stack.length - 1; i >= pos; i--) {
            if (i > pos || !tagName && options.warn) {
              options.warn("tag <" + stack[i].tag + "> has no matching end tag.", {
                start: stack[i].start,
                end: stack[i].end
              });
            }

            if (options.end) {
              options.end(stack[i].tag, start, end);
            }
          } // Remove the open elements from the stack


          stack.length = pos;
          lastTag = pos && stack[pos - 1].tag;
        } else if (lowerCasedTagName === 'br') {
          if (options.start) {
            options.start(tagName, [], true, start, end);
          }
        } else if (lowerCasedTagName === 'p') {
          if (options.start) {
            options.start(tagName, [], false, start, end);
          }

          if (options.end) {
            options.end(tagName, start, end);
          }
        }
      }
    }
    /*  */


    var onRE = /^@|^v-on:/;
    var dirRE = /^v-|^@|^:|^#/;
    var forAliasRE = /([\s\S]*?)\s+(?:in|of)\s+([\s\S]*)/;
    var forIteratorRE = /,([^,\}\]]*)(?:,([^,\}\]]*))?$/;
    var stripParensRE = /^\(|\)$/g;
    var dynamicArgRE = /^\[.*\]$/;
    var argRE = /:(.*)$/;
    var bindRE = /^:|^\.|^v-bind:/;
    var modifierRE = /\.[^.\]]+(?=[^\]]*$)/g;
    var slotRE = /^v-slot(:|$)|^#/;
    var lineBreakRE = /[\r\n]/;
    var whitespaceRE$1 = /\s+/g;
    var invalidAttributeRE = /[\s"'<>\/=]/;
    var decodeHTMLCached = cached(he.decode);
    var emptySlotScopeToken = "_empty_"; // configurable state

    var warn$2;
    var delimiters;
    var transforms;
    var preTransforms;
    var postTransforms;
    var platformIsPreTag;
    var platformMustUseProp;
    var platformGetTagNamespace;
    var maybeComponent;

    function createASTElement(tag, attrs, parent) {
      return {
        type: 1,
        tag: tag,
        attrsList: attrs,
        attrsMap: makeAttrsMap(attrs),
        rawAttrsMap: {},
        parent: parent,
        children: []
      };
    }
    /**
     * Convert HTML string to AST.
     */


    function parse(template, options) {
      warn$2 = options.warn || baseWarn;
      platformIsPreTag = options.isPreTag || no;
      platformMustUseProp = options.mustUseProp || no;
      platformGetTagNamespace = options.getTagNamespace || no;
      var isReservedTag = options.isReservedTag || no;

      maybeComponent = function maybeComponent(el) {
        return !!el.component || !isReservedTag(el.tag);
      };

      transforms = pluckModuleFunction(options.modules, 'transformNode');
      preTransforms = pluckModuleFunction(options.modules, 'preTransformNode');
      postTransforms = pluckModuleFunction(options.modules, 'postTransformNode');
      delimiters = options.delimiters;
      var stack = [];
      var preserveWhitespace = options.preserveWhitespace !== false;
      var whitespaceOption = options.whitespace;
      var root;
      var currentParent;
      var inVPre = false;
      var inPre = false;
      var warned = false;

      function warnOnce(msg, range) {
        if (!warned) {
          warned = true;
          warn$2(msg, range);
        }
      }

      function closeElement(element) {
        trimEndingWhitespace(element);

        if (!inVPre && !element.processed) {
          element = processElement(element, options);
        } // tree management


        if (!stack.length && element !== root) {
          // allow root elements with v-if, v-else-if and v-else
          if (root.if && (element.elseif || element.else)) {
            {
              checkRootConstraints(element);
            }
            addIfCondition(root, {
              exp: element.elseif,
              block: element
            });
          } else {
            warnOnce("Component template should contain exactly one root element. " + "If you are using v-if on multiple elements, " + "use v-else-if to chain them instead.", {
              start: element.start
            });
          }
        }

        if (currentParent && !element.forbidden) {
          if (element.elseif || element.else) {
            processIfConditions(element, currentParent);
          } else {
            if (element.slotScope) {
              // scoped slot
              // keep it in the children list so that v-else(-if) conditions can
              // find it as the prev node.
              var name = element.slotTarget || '"default"';
              (currentParent.scopedSlots || (currentParent.scopedSlots = {}))[name] = element;
            }

            currentParent.children.push(element);
            element.parent = currentParent;
          }
        } // final children cleanup
        // filter out scoped slots


        element.children = element.children.filter(function (c) {
          return !c.slotScope;
        }); // remove trailing whitespace node again

        trimEndingWhitespace(element); // check pre state

        if (element.pre) {
          inVPre = false;
        }

        if (platformIsPreTag(element.tag)) {
          inPre = false;
        } // apply post-transforms


        for (var i = 0; i < postTransforms.length; i++) {
          postTransforms[i](element, options);
        }
      }

      function trimEndingWhitespace(el) {
        // remove trailing whitespace node
        if (!inPre) {
          var lastNode;

          while ((lastNode = el.children[el.children.length - 1]) && lastNode.type === 3 && lastNode.text === ' ') {
            el.children.pop();
          }
        }
      }

      function checkRootConstraints(el) {
        if (el.tag === 'slot' || el.tag === 'template') {
          warnOnce("Cannot use <" + el.tag + "> as component root element because it may " + 'contain multiple nodes.', {
            start: el.start
          });
        }

        if (el.attrsMap.hasOwnProperty('v-for')) {
          warnOnce('Cannot use v-for on stateful component root element because ' + 'it renders multiple elements.', el.rawAttrsMap['v-for']);
        }
      }

      parseHTML(template, {
        warn: warn$2,
        expectHTML: options.expectHTML,
        isUnaryTag: options.isUnaryTag,
        canBeLeftOpenTag: options.canBeLeftOpenTag,
        shouldDecodeNewlines: options.shouldDecodeNewlines,
        shouldDecodeNewlinesForHref: options.shouldDecodeNewlinesForHref,
        shouldKeepComment: options.comments,
        outputSourceRange: options.outputSourceRange,
        start: function start(tag, attrs, unary, start$1, end) {
          // check namespace.
          // inherit parent ns if there is one
          var ns = currentParent && currentParent.ns || platformGetTagNamespace(tag); // handle IE svg bug

          /* istanbul ignore if */

          if (isIE && ns === 'svg') {
            attrs = guardIESVGBug(attrs);
          }

          var element = createASTElement(tag, attrs, currentParent);

          if (ns) {
            element.ns = ns;
          }

          {
            if (options.outputSourceRange) {
              element.start = start$1;
              element.end = end;
              element.rawAttrsMap = element.attrsList.reduce(function (cumulated, attr) {
                cumulated[attr.name] = attr;
                return cumulated;
              }, {});
            }

            attrs.forEach(function (attr) {
              if (invalidAttributeRE.test(attr.name)) {
                warn$2("Invalid dynamic argument expression: attribute names cannot contain " + "spaces, quotes, <, >, / or =.", {
                  start: attr.start + attr.name.indexOf("["),
                  end: attr.start + attr.name.length
                });
              }
            });
          }

          if (isForbiddenTag(element) && !isServerRendering()) {
            element.forbidden = true;
            warn$2('Templates should only be responsible for mapping the state to the ' + 'UI. Avoid placing tags with side-effects in your templates, such as ' + "<" + tag + ">" + ', as they will not be parsed.', {
              start: element.start
            });
          } // apply pre-transforms


          for (var i = 0; i < preTransforms.length; i++) {
            element = preTransforms[i](element, options) || element;
          }

          if (!inVPre) {
            processPre(element);

            if (element.pre) {
              inVPre = true;
            }
          }

          if (platformIsPreTag(element.tag)) {
            inPre = true;
          }

          if (inVPre) {
            processRawAttrs(element);
          } else if (!element.processed) {
            // structural directives
            processFor(element);
            processIf(element);
            processOnce(element);
          }

          if (!root) {
            root = element;
            {
              checkRootConstraints(root);
            }
          }

          if (!unary) {
            currentParent = element;
            stack.push(element);
          } else {
            closeElement(element);
          }
        },
        end: function end(tag, start, end$1) {
          var element = stack[stack.length - 1]; // pop stack

          stack.length -= 1;
          currentParent = stack[stack.length - 1];

          if (options.outputSourceRange) {
            element.end = end$1;
          }

          closeElement(element);
        },
        chars: function chars(text, start, end) {
          if (!currentParent) {
            {
              if (text === template) {
                warnOnce('Component template requires a root element, rather than just text.', {
                  start: start
                });
              } else if (text = text.trim()) {
                warnOnce("text \"" + text + "\" outside root element will be ignored.", {
                  start: start
                });
              }
            }
            return;
          } // IE textarea placeholder bug

          /* istanbul ignore if */


          if (isIE && currentParent.tag === 'textarea' && currentParent.attrsMap.placeholder === text) {
            return;
          }

          var children = currentParent.children;

          if (inPre || text.trim()) {
            text = isTextTag(currentParent) ? text : decodeHTMLCached(text);
          } else if (!children.length) {
            // remove the whitespace-only node right after an opening tag
            text = '';
          } else if (whitespaceOption) {
            if (whitespaceOption === 'condense') {
              // in condense mode, remove the whitespace node if it contains
              // line break, otherwise condense to a single space
              text = lineBreakRE.test(text) ? '' : ' ';
            } else {
              text = ' ';
            }
          } else {
            text = preserveWhitespace ? ' ' : '';
          }

          if (text) {
            if (!inPre && whitespaceOption === 'condense') {
              // condense consecutive whitespaces into single space
              text = text.replace(whitespaceRE$1, ' ');
            }

            var res;
            var child;

            if (!inVPre && text !== ' ' && (res = parseText(text, delimiters))) {
              child = {
                type: 2,
                expression: res.expression,
                tokens: res.tokens,
                text: text
              };
            } else if (text !== ' ' || !children.length || children[children.length - 1].text !== ' ') {
              child = {
                type: 3,
                text: text
              };
            }

            if (child) {
              if (options.outputSourceRange) {
                child.start = start;
                child.end = end;
              }

              children.push(child);
            }
          }
        },
        comment: function comment(text, start, end) {
          // adding anything as a sibling to the root node is forbidden
          // comments should still be allowed, but ignored
          if (currentParent) {
            var child = {
              type: 3,
              text: text,
              isComment: true
            };

            if (options.outputSourceRange) {
              child.start = start;
              child.end = end;
            }

            currentParent.children.push(child);
          }
        }
      });
      return root;
    }

    function processPre(el) {
      if (getAndRemoveAttr(el, 'v-pre') != null) {
        el.pre = true;
      }
    }

    function processRawAttrs(el) {
      var list = el.attrsList;
      var len = list.length;

      if (len) {
        var attrs = el.attrs = new Array(len);

        for (var i = 0; i < len; i++) {
          attrs[i] = {
            name: list[i].name,
            value: JSON.stringify(list[i].value)
          };

          if (list[i].start != null) {
            attrs[i].start = list[i].start;
            attrs[i].end = list[i].end;
          }
        }
      } else if (!el.pre) {
        // non root node in pre blocks with no attributes
        el.plain = true;
      }
    }

    function processElement(element, options) {
      processKey(element); // determine whether this is a plain element after
      // removing structural attributes

      element.plain = !element.key && !element.scopedSlots && !element.attrsList.length;
      processRef(element);
      processSlotContent(element);
      processSlotOutlet(element);
      processComponent(element);

      for (var i = 0; i < transforms.length; i++) {
        element = transforms[i](element, options) || element;
      }

      processAttrs(element);
      return element;
    }

    function processKey(el) {
      var exp = getBindingAttr(el, 'key');

      if (exp) {
        {
          if (el.tag === 'template') {
            warn$2("<template> cannot be keyed. Place the key on real elements instead.", getRawBindingAttr(el, 'key'));
          }

          if (el.for) {
            var iterator = el.iterator2 || el.iterator1;
            var parent = el.parent;

            if (iterator && iterator === exp && parent && parent.tag === 'transition-group') {
              warn$2("Do not use v-for index as key on <transition-group> children, " + "this is the same as not using keys.", getRawBindingAttr(el, 'key'), true
              /* tip */
              );
            }
          }
        }
        el.key = exp;
      }
    }

    function processRef(el) {
      var ref = getBindingAttr(el, 'ref');

      if (ref) {
        el.ref = ref;
        el.refInFor = checkInFor(el);
      }
    }

    function processFor(el) {
      var exp;

      if (exp = getAndRemoveAttr(el, 'v-for')) {
        var res = parseFor(exp);

        if (res) {
          extend(el, res);
        } else {
          warn$2("Invalid v-for expression: " + exp, el.rawAttrsMap['v-for']);
        }
      }
    }

    function parseFor(exp) {
      var inMatch = exp.match(forAliasRE);

      if (!inMatch) {
        return;
      }

      var res = {};
      res.for = inMatch[2].trim();
      var alias = inMatch[1].trim().replace(stripParensRE, '');
      var iteratorMatch = alias.match(forIteratorRE);

      if (iteratorMatch) {
        res.alias = alias.replace(forIteratorRE, '').trim();
        res.iterator1 = iteratorMatch[1].trim();

        if (iteratorMatch[2]) {
          res.iterator2 = iteratorMatch[2].trim();
        }
      } else {
        res.alias = alias;
      }

      return res;
    }

    function processIf(el) {
      var exp = getAndRemoveAttr(el, 'v-if');

      if (exp) {
        el.if = exp;
        addIfCondition(el, {
          exp: exp,
          block: el
        });
      } else {
        if (getAndRemoveAttr(el, 'v-else') != null) {
          el.else = true;
        }

        var elseif = getAndRemoveAttr(el, 'v-else-if');

        if (elseif) {
          el.elseif = elseif;
        }
      }
    }

    function processIfConditions(el, parent) {
      var prev = findPrevElement(parent.children);

      if (prev && prev.if) {
        addIfCondition(prev, {
          exp: el.elseif,
          block: el
        });
      } else {
        warn$2("v-" + (el.elseif ? 'else-if="' + el.elseif + '"' : 'else') + " " + "used on element <" + el.tag + "> without corresponding v-if.", el.rawAttrsMap[el.elseif ? 'v-else-if' : 'v-else']);
      }
    }

    function findPrevElement(children) {
      var i = children.length;

      while (i--) {
        if (children[i].type === 1) {
          return children[i];
        } else {
          if (children[i].text !== ' ') {
            warn$2("text \"" + children[i].text.trim() + "\" between v-if and v-else(-if) " + "will be ignored.", children[i]);
          }

          children.pop();
        }
      }
    }

    function addIfCondition(el, condition) {
      if (!el.ifConditions) {
        el.ifConditions = [];
      }

      el.ifConditions.push(condition);
    }

    function processOnce(el) {
      var once$$1 = getAndRemoveAttr(el, 'v-once');

      if (once$$1 != null) {
        el.once = true;
      }
    } // handle content being passed to a component as slot,
    // e.g. <template slot="xxx">, <div slot-scope="xxx">


    function processSlotContent(el) {
      var slotScope;

      if (el.tag === 'template') {
        slotScope = getAndRemoveAttr(el, 'scope');
        /* istanbul ignore if */

        if (slotScope) {
          warn$2("the \"scope\" attribute for scoped slots have been deprecated and " + "replaced by \"slot-scope\" since 2.5. The new \"slot-scope\" attribute " + "can also be used on plain elements in addition to <template> to " + "denote scoped slots.", el.rawAttrsMap['scope'], true);
        }

        el.slotScope = slotScope || getAndRemoveAttr(el, 'slot-scope');
      } else if (slotScope = getAndRemoveAttr(el, 'slot-scope')) {
        /* istanbul ignore if */
        if (el.attrsMap['v-for']) {
          warn$2("Ambiguous combined usage of slot-scope and v-for on <" + el.tag + "> " + "(v-for takes higher priority). Use a wrapper <template> for the " + "scoped slot to make it clearer.", el.rawAttrsMap['slot-scope'], true);
        }

        el.slotScope = slotScope;
      } // slot="xxx"


      var slotTarget = getBindingAttr(el, 'slot');

      if (slotTarget) {
        el.slotTarget = slotTarget === '""' ? '"default"' : slotTarget;
        el.slotTargetDynamic = !!(el.attrsMap[':slot'] || el.attrsMap['v-bind:slot']); // preserve slot as an attribute for native shadow DOM compat
        // only for non-scoped slots.

        if (el.tag !== 'template' && !el.slotScope) {
          addAttr(el, 'slot', slotTarget, getRawBindingAttr(el, 'slot'));
        }
      } // 2.6 v-slot syntax


      {
        if (el.tag === 'template') {
          // v-slot on <template>
          var slotBinding = getAndRemoveAttrByRegex(el, slotRE);

          if (slotBinding) {
            {
              if (el.slotTarget || el.slotScope) {
                warn$2("Unexpected mixed usage of different slot syntaxes.", el);
              }

              if (el.parent && !maybeComponent(el.parent)) {
                warn$2("<template v-slot> can only appear at the root level inside " + "the receiving component", el);
              }
            }
            var ref = getSlotName(slotBinding);
            var name = ref.name;
            var dynamic = ref.dynamic;
            el.slotTarget = name;
            el.slotTargetDynamic = dynamic;
            el.slotScope = slotBinding.value || emptySlotScopeToken; // force it into a scoped slot for perf
          }
        } else {
          // v-slot on component, denotes default slot
          var slotBinding$1 = getAndRemoveAttrByRegex(el, slotRE);

          if (slotBinding$1) {
            {
              if (!maybeComponent(el)) {
                warn$2("v-slot can only be used on components or <template>.", slotBinding$1);
              }

              if (el.slotScope || el.slotTarget) {
                warn$2("Unexpected mixed usage of different slot syntaxes.", el);
              }

              if (el.scopedSlots) {
                warn$2("To avoid scope ambiguity, the default slot should also use " + "<template> syntax when there are other named slots.", slotBinding$1);
              }
            } // add the component's children to its default slot

            var slots = el.scopedSlots || (el.scopedSlots = {});
            var ref$1 = getSlotName(slotBinding$1);
            var name$1 = ref$1.name;
            var dynamic$1 = ref$1.dynamic;
            var slotContainer = slots[name$1] = createASTElement('template', [], el);
            slotContainer.slotTarget = name$1;
            slotContainer.slotTargetDynamic = dynamic$1;
            slotContainer.children = el.children.filter(function (c) {
              if (!c.slotScope) {
                c.parent = slotContainer;
                return true;
              }
            });
            slotContainer.slotScope = slotBinding$1.value || emptySlotScopeToken; // remove children as they are returned from scopedSlots now

            el.children = []; // mark el non-plain so data gets generated

            el.plain = false;
          }
        }
      }
    }

    function getSlotName(binding) {
      var name = binding.name.replace(slotRE, '');

      if (!name) {
        if (binding.name[0] !== '#') {
          name = 'default';
        } else {
          warn$2("v-slot shorthand syntax requires a slot name.", binding);
        }
      }

      return dynamicArgRE.test(name) // dynamic [name]
      ? {
        name: name.slice(1, -1),
        dynamic: true
      } // static name
      : {
        name: "\"" + name + "\"",
        dynamic: false
      };
    } // handle <slot/> outlets


    function processSlotOutlet(el) {
      if (el.tag === 'slot') {
        el.slotName = getBindingAttr(el, 'name');

        if (el.key) {
          warn$2("`key` does not work on <slot> because slots are abstract outlets " + "and can possibly expand into multiple elements. " + "Use the key on a wrapping element instead.", getRawBindingAttr(el, 'key'));
        }
      }
    }

    function processComponent(el) {
      var binding;

      if (binding = getBindingAttr(el, 'is')) {
        el.component = binding;
      }

      if (getAndRemoveAttr(el, 'inline-template') != null) {
        el.inlineTemplate = true;
      }
    }

    function processAttrs(el) {
      var list = el.attrsList;
      var i, l, name, rawName, value, modifiers, syncGen, isDynamic;

      for (i = 0, l = list.length; i < l; i++) {
        name = rawName = list[i].name;
        value = list[i].value;

        if (dirRE.test(name)) {
          // mark element as dynamic
          el.hasBindings = true; // modifiers

          modifiers = parseModifiers(name.replace(dirRE, '')); // support .foo shorthand syntax for the .prop modifier

          if (modifiers) {
            name = name.replace(modifierRE, '');
          }

          if (bindRE.test(name)) {
            // v-bind
            name = name.replace(bindRE, '');
            value = parseFilters(value);
            isDynamic = dynamicArgRE.test(name);

            if (isDynamic) {
              name = name.slice(1, -1);
            }

            if (value.trim().length === 0) {
              warn$2("The value for a v-bind expression cannot be empty. Found in \"v-bind:" + name + "\"");
            }

            if (modifiers) {
              if (modifiers.prop && !isDynamic) {
                name = camelize(name);

                if (name === 'innerHtml') {
                  name = 'innerHTML';
                }
              }

              if (modifiers.camel && !isDynamic) {
                name = camelize(name);
              }

              if (modifiers.sync) {
                syncGen = genAssignmentCode(value, "$event");

                if (!isDynamic) {
                  addHandler(el, "update:" + camelize(name), syncGen, null, false, warn$2, list[i]);

                  if (hyphenate(name) !== camelize(name)) {
                    addHandler(el, "update:" + hyphenate(name), syncGen, null, false, warn$2, list[i]);
                  }
                } else {
                  // handler w/ dynamic event name
                  addHandler(el, "\"update:\"+(" + name + ")", syncGen, null, false, warn$2, list[i], true // dynamic
                  );
                }
              }
            }

            if (modifiers && modifiers.prop || !el.component && platformMustUseProp(el.tag, el.attrsMap.type, name)) {
              addProp(el, name, value, list[i], isDynamic);
            } else {
              addAttr(el, name, value, list[i], isDynamic);
            }
          } else if (onRE.test(name)) {
            // v-on
            name = name.replace(onRE, '');
            isDynamic = dynamicArgRE.test(name);

            if (isDynamic) {
              name = name.slice(1, -1);
            }

            addHandler(el, name, value, modifiers, false, warn$2, list[i], isDynamic);
          } else {
            // normal directives
            name = name.replace(dirRE, ''); // parse arg

            var argMatch = name.match(argRE);
            var arg = argMatch && argMatch[1];
            isDynamic = false;

            if (arg) {
              name = name.slice(0, -(arg.length + 1));

              if (dynamicArgRE.test(arg)) {
                arg = arg.slice(1, -1);
                isDynamic = true;
              }
            }

            addDirective(el, name, rawName, value, arg, isDynamic, modifiers, list[i]);

            if (name === 'model') {
              checkForAliasModel(el, value);
            }
          }
        } else {
          // literal attribute
          {
            var res = parseText(value, delimiters);

            if (res) {
              warn$2(name + "=\"" + value + "\": " + 'Interpolation inside attributes has been removed. ' + 'Use v-bind or the colon shorthand instead. For example, ' + 'instead of <div id="{{ val }}">, use <div :id="val">.', list[i]);
            }
          }
          addAttr(el, name, JSON.stringify(value), list[i]); // #6887 firefox doesn't update muted state if set via attribute
          // even immediately after element creation

          if (!el.component && name === 'muted' && platformMustUseProp(el.tag, el.attrsMap.type, name)) {
            addProp(el, name, 'true', list[i]);
          }
        }
      }
    }

    function checkInFor(el) {
      var parent = el;

      while (parent) {
        if (parent.for !== undefined) {
          return true;
        }

        parent = parent.parent;
      }

      return false;
    }

    function parseModifiers(name) {
      var match = name.match(modifierRE);

      if (match) {
        var ret = {};
        match.forEach(function (m) {
          ret[m.slice(1)] = true;
        });
        return ret;
      }
    }

    function makeAttrsMap(attrs) {
      var map = {};

      for (var i = 0, l = attrs.length; i < l; i++) {
        if (map[attrs[i].name] && !isIE && !isEdge) {
          warn$2('duplicate attribute: ' + attrs[i].name, attrs[i]);
        }

        map[attrs[i].name] = attrs[i].value;
      }

      return map;
    } // for script (e.g. type="x/template") or style, do not decode content


    function isTextTag(el) {
      return el.tag === 'script' || el.tag === 'style';
    }

    function isForbiddenTag(el) {
      return el.tag === 'style' || el.tag === 'script' && (!el.attrsMap.type || el.attrsMap.type === 'text/javascript');
    }

    var ieNSBug = /^xmlns:NS\d+/;
    var ieNSPrefix = /^NS\d+:/;
    /* istanbul ignore next */

    function guardIESVGBug(attrs) {
      var res = [];

      for (var i = 0; i < attrs.length; i++) {
        var attr = attrs[i];

        if (!ieNSBug.test(attr.name)) {
          attr.name = attr.name.replace(ieNSPrefix, '');
          res.push(attr);
        }
      }

      return res;
    }

    function checkForAliasModel(el, value) {
      var _el = el;

      while (_el) {
        if (_el.for && _el.alias === value) {
          warn$2("<" + el.tag + " v-model=\"" + value + "\">: " + "You are binding v-model directly to a v-for iteration alias. " + "This will not be able to modify the v-for source array because " + "writing to the alias is like modifying a function local variable. " + "Consider using an array of objects and use v-model on an object property instead.", el.rawAttrsMap['v-model']);
        }

        _el = _el.parent;
      }
    }
    /*  */


    function preTransformNode(el, options) {
      if (el.tag === 'input') {
        var map = el.attrsMap;

        if (!map['v-model']) {
          return;
        }

        var typeBinding;

        if (map[':type'] || map['v-bind:type']) {
          typeBinding = getBindingAttr(el, 'type');
        }

        if (!map.type && !typeBinding && map['v-bind']) {
          typeBinding = "(" + map['v-bind'] + ").type";
        }

        if (typeBinding) {
          var ifCondition = getAndRemoveAttr(el, 'v-if', true);
          var ifConditionExtra = ifCondition ? "&&(" + ifCondition + ")" : "";
          var hasElse = getAndRemoveAttr(el, 'v-else', true) != null;
          var elseIfCondition = getAndRemoveAttr(el, 'v-else-if', true); // 1. checkbox

          var branch0 = cloneASTElement(el); // process for on the main node

          processFor(branch0);
          addRawAttr(branch0, 'type', 'checkbox');
          processElement(branch0, options);
          branch0.processed = true; // prevent it from double-processed

          branch0.if = "(" + typeBinding + ")==='checkbox'" + ifConditionExtra;
          addIfCondition(branch0, {
            exp: branch0.if,
            block: branch0
          }); // 2. add radio else-if condition

          var branch1 = cloneASTElement(el);
          getAndRemoveAttr(branch1, 'v-for', true);
          addRawAttr(branch1, 'type', 'radio');
          processElement(branch1, options);
          addIfCondition(branch0, {
            exp: "(" + typeBinding + ")==='radio'" + ifConditionExtra,
            block: branch1
          }); // 3. other

          var branch2 = cloneASTElement(el);
          getAndRemoveAttr(branch2, 'v-for', true);
          addRawAttr(branch2, ':type', typeBinding);
          processElement(branch2, options);
          addIfCondition(branch0, {
            exp: ifCondition,
            block: branch2
          });

          if (hasElse) {
            branch0.else = true;
          } else if (elseIfCondition) {
            branch0.elseif = elseIfCondition;
          }

          return branch0;
        }
      }
    }

    function cloneASTElement(el) {
      return createASTElement(el.tag, el.attrsList.slice(), el.parent);
    }

    var model$1 = {
      preTransformNode: preTransformNode
    };
    var modules$1 = [klass$1, style$1, model$1];
    /*  */

    function text(el, dir) {
      if (dir.value) {
        addProp(el, 'textContent', "_s(" + dir.value + ")", dir);
      }
    }
    /*  */


    function html(el, dir) {
      if (dir.value) {
        addProp(el, 'innerHTML', "_s(" + dir.value + ")", dir);
      }
    }

    var directives$1 = {
      model: model,
      text: text,
      html: html
    };
    /*  */

    var baseOptions = {
      expectHTML: true,
      modules: modules$1,
      directives: directives$1,
      isPreTag: isPreTag,
      isUnaryTag: isUnaryTag,
      mustUseProp: mustUseProp,
      canBeLeftOpenTag: canBeLeftOpenTag,
      isReservedTag: isReservedTag,
      getTagNamespace: getTagNamespace,
      staticKeys: genStaticKeys(modules$1)
    };
    /*  */

    var isStaticKey;
    var isPlatformReservedTag;
    var genStaticKeysCached = cached(genStaticKeys$1);
    /**
     * Goal of the optimizer: walk the generated template AST tree
     * and detect sub-trees that are purely static, i.e. parts of
     * the DOM that never needs to change.
     *
     * Once we detect these sub-trees, we can:
     *
     * 1. Hoist them into constants, so that we no longer need to
     *    create fresh nodes for them on each re-render;
     * 2. Completely skip them in the patching process.
     */

    function optimize(root, options) {
      if (!root) {
        return;
      }

      isStaticKey = genStaticKeysCached(options.staticKeys || '');
      isPlatformReservedTag = options.isReservedTag || no; // first pass: mark all non-static nodes.

      markStatic$1(root); // second pass: mark static roots.

      markStaticRoots(root, false);
    }

    function genStaticKeys$1(keys) {
      return makeMap('type,tag,attrsList,attrsMap,plain,parent,children,attrs,start,end,rawAttrsMap' + (keys ? ',' + keys : ''));
    }

    function markStatic$1(node) {
      node.static = isStatic(node);

      if (node.type === 1) {
        // do not make component slot content static. this avoids
        // 1. components not able to mutate slot nodes
        // 2. static slot content fails for hot-reloading
        if (!isPlatformReservedTag(node.tag) && node.tag !== 'slot' && node.attrsMap['inline-template'] == null) {
          return;
        }

        for (var i = 0, l = node.children.length; i < l; i++) {
          var child = node.children[i];
          markStatic$1(child);

          if (!child.static) {
            node.static = false;
          }
        }

        if (node.ifConditions) {
          for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
            var block = node.ifConditions[i$1].block;
            markStatic$1(block);

            if (!block.static) {
              node.static = false;
            }
          }
        }
      }
    }

    function markStaticRoots(node, isInFor) {
      if (node.type === 1) {
        if (node.static || node.once) {
          node.staticInFor = isInFor;
        } // For a node to qualify as a static root, it should have children that
        // are not just static text. Otherwise the cost of hoisting out will
        // outweigh the benefits and it's better off to just always render it fresh.


        if (node.static && node.children.length && !(node.children.length === 1 && node.children[0].type === 3)) {
          node.staticRoot = true;
          return;
        } else {
          node.staticRoot = false;
        }

        if (node.children) {
          for (var i = 0, l = node.children.length; i < l; i++) {
            markStaticRoots(node.children[i], isInFor || !!node.for);
          }
        }

        if (node.ifConditions) {
          for (var i$1 = 1, l$1 = node.ifConditions.length; i$1 < l$1; i$1++) {
            markStaticRoots(node.ifConditions[i$1].block, isInFor);
          }
        }
      }
    }

    function isStatic(node) {
      if (node.type === 2) {
        // expression
        return false;
      }

      if (node.type === 3) {
        // text
        return true;
      }

      return !!(node.pre || !node.hasBindings && // no dynamic bindings
      !node.if && !node.for && // not v-if or v-for or v-else
      !isBuiltInTag(node.tag) && // not a built-in
      isPlatformReservedTag(node.tag) && // not a component
      !isDirectChildOfTemplateFor(node) && Object.keys(node).every(isStaticKey));
    }

    function isDirectChildOfTemplateFor(node) {
      while (node.parent) {
        node = node.parent;

        if (node.tag !== 'template') {
          return false;
        }

        if (node.for) {
          return true;
        }
      }

      return false;
    }
    /*  */


    var fnExpRE = /^([\w$_]+|\([^)]*?\))\s*=>|^function(?:\s+[\w$]+)?\s*\(/;
    var fnInvokeRE = /\([^)]*?\);*$/;
    var simplePathRE = /^[A-Za-z_$][\w$]*(?:\.[A-Za-z_$][\w$]*|\['[^']*?']|\["[^"]*?"]|\[\d+]|\[[A-Za-z_$][\w$]*])*$/; // KeyboardEvent.keyCode aliases

    var keyCodes = {
      esc: 27,
      tab: 9,
      enter: 13,
      space: 32,
      up: 38,
      left: 37,
      right: 39,
      down: 40,
      'delete': [8, 46]
    }; // KeyboardEvent.key aliases

    var keyNames = {
      // #7880: IE11 and Edge use `Esc` for Escape key name.
      esc: ['Esc', 'Escape'],
      tab: 'Tab',
      enter: 'Enter',
      // #9112: IE11 uses `Spacebar` for Space key name.
      space: [' ', 'Spacebar'],
      // #7806: IE11 uses key names without `Arrow` prefix for arrow keys.
      up: ['Up', 'ArrowUp'],
      left: ['Left', 'ArrowLeft'],
      right: ['Right', 'ArrowRight'],
      down: ['Down', 'ArrowDown'],
      // #9112: IE11 uses `Del` for Delete key name.
      'delete': ['Backspace', 'Delete', 'Del']
    }; // #4868: modifiers that prevent the execution of the listener
    // need to explicitly return null so that we can determine whether to remove
    // the listener for .once

    var genGuard = function genGuard(condition) {
      return "if(" + condition + ")return null;";
    };

    var modifierCode = {
      stop: '$event.stopPropagation();',
      prevent: '$event.preventDefault();',
      self: genGuard("$event.target !== $event.currentTarget"),
      ctrl: genGuard("!$event.ctrlKey"),
      shift: genGuard("!$event.shiftKey"),
      alt: genGuard("!$event.altKey"),
      meta: genGuard("!$event.metaKey"),
      left: genGuard("'button' in $event && $event.button !== 0"),
      middle: genGuard("'button' in $event && $event.button !== 1"),
      right: genGuard("'button' in $event && $event.button !== 2")
    };

    function genHandlers(events, isNative) {
      var prefix = isNative ? 'nativeOn:' : 'on:';
      var staticHandlers = "";
      var dynamicHandlers = "";

      for (var name in events) {
        var handlerCode = genHandler(events[name]);

        if (events[name] && events[name].dynamic) {
          dynamicHandlers += name + "," + handlerCode + ",";
        } else {
          staticHandlers += "\"" + name + "\":" + handlerCode + ",";
        }
      }

      staticHandlers = "{" + staticHandlers.slice(0, -1) + "}";

      if (dynamicHandlers) {
        return prefix + "_d(" + staticHandlers + ",[" + dynamicHandlers.slice(0, -1) + "])";
      } else {
        return prefix + staticHandlers;
      }
    }

    function genHandler(handler) {
      if (!handler) {
        return 'function(){}';
      }

      if (Array.isArray(handler)) {
        return "[" + handler.map(function (handler) {
          return genHandler(handler);
        }).join(',') + "]";
      }

      var isMethodPath = simplePathRE.test(handler.value);
      var isFunctionExpression = fnExpRE.test(handler.value);
      var isFunctionInvocation = simplePathRE.test(handler.value.replace(fnInvokeRE, ''));

      if (!handler.modifiers) {
        if (isMethodPath || isFunctionExpression) {
          return handler.value;
        }

        return "function($event){" + (isFunctionInvocation ? "return " + handler.value : handler.value) + "}"; // inline statement
      } else {
        var code = '';
        var genModifierCode = '';
        var keys = [];

        for (var key in handler.modifiers) {
          if (modifierCode[key]) {
            genModifierCode += modifierCode[key]; // left/right

            if (keyCodes[key]) {
              keys.push(key);
            }
          } else if (key === 'exact') {
            var modifiers = handler.modifiers;
            genModifierCode += genGuard(['ctrl', 'shift', 'alt', 'meta'].filter(function (keyModifier) {
              return !modifiers[keyModifier];
            }).map(function (keyModifier) {
              return "$event." + keyModifier + "Key";
            }).join('||'));
          } else {
            keys.push(key);
          }
        }

        if (keys.length) {
          code += genKeyFilter(keys);
        } // Make sure modifiers like prevent and stop get executed after key filtering


        if (genModifierCode) {
          code += genModifierCode;
        }

        var handlerCode = isMethodPath ? "return " + handler.value + "($event)" : isFunctionExpression ? "return (" + handler.value + ")($event)" : isFunctionInvocation ? "return " + handler.value : handler.value;
        return "function($event){" + code + handlerCode + "}";
      }
    }

    function genKeyFilter(keys) {
      return (// make sure the key filters only apply to KeyboardEvents
        // #9441: can't use 'keyCode' in $event because Chrome autofill fires fake
        // key events that do not have keyCode property...
        "if(!$event.type.indexOf('key')&&" + keys.map(genFilterCode).join('&&') + ")return null;"
      );
    }

    function genFilterCode(key) {
      var keyVal = parseInt(key, 10);

      if (keyVal) {
        return "$event.keyCode!==" + keyVal;
      }

      var keyCode = keyCodes[key];
      var keyName = keyNames[key];
      return "_k($event.keyCode," + JSON.stringify(key) + "," + JSON.stringify(keyCode) + "," + "$event.key," + "" + JSON.stringify(keyName) + ")";
    }
    /*  */


    function on(el, dir) {
      if (dir.modifiers) {
        warn("v-on without argument does not support modifiers.");
      }

      el.wrapListeners = function (code) {
        return "_g(" + code + "," + dir.value + ")";
      };
    }
    /*  */


    function bind$1(el, dir) {
      el.wrapData = function (code) {
        return "_b(" + code + ",'" + el.tag + "'," + dir.value + "," + (dir.modifiers && dir.modifiers.prop ? 'true' : 'false') + (dir.modifiers && dir.modifiers.sync ? ',true' : '') + ")";
      };
    }
    /*  */


    var baseDirectives = {
      on: on,
      bind: bind$1,
      cloak: noop
    };
    /*  */

    var CodegenState = function CodegenState(options) {
      this.options = options;
      this.warn = options.warn || baseWarn;
      this.transforms = pluckModuleFunction(options.modules, 'transformCode');
      this.dataGenFns = pluckModuleFunction(options.modules, 'genData');
      this.directives = extend(extend({}, baseDirectives), options.directives);
      var isReservedTag = options.isReservedTag || no;

      this.maybeComponent = function (el) {
        return !!el.component || !isReservedTag(el.tag);
      };

      this.onceId = 0;
      this.staticRenderFns = [];
      this.pre = false;
    };

    function generate(ast, options) {
      var state = new CodegenState(options);
      var code = ast ? genElement(ast, state) : '_c("div")';
      return {
        render: "with(this){return " + code + "}",
        staticRenderFns: state.staticRenderFns
      };
    }

    function genElement(el, state) {
      if (el.parent) {
        el.pre = el.pre || el.parent.pre;
      }

      if (el.staticRoot && !el.staticProcessed) {
        return genStatic(el, state);
      } else if (el.once && !el.onceProcessed) {
        return genOnce(el, state);
      } else if (el.for && !el.forProcessed) {
        return genFor(el, state);
      } else if (el.if && !el.ifProcessed) {
        return genIf(el, state);
      } else if (el.tag === 'template' && !el.slotTarget && !state.pre) {
        return genChildren(el, state) || 'void 0';
      } else if (el.tag === 'slot') {
        return genSlot(el, state);
      } else {
        // component or element
        var code;

        if (el.component) {
          code = genComponent(el.component, el, state);
        } else {
          var data;

          if (!el.plain || el.pre && state.maybeComponent(el)) {
            data = genData$2(el, state);
          }

          var children = el.inlineTemplate ? null : genChildren(el, state, true);
          code = "_c('" + el.tag + "'" + (data ? "," + data : '') + (children ? "," + children : '') + ")";
        } // module transforms


        for (var i = 0; i < state.transforms.length; i++) {
          code = state.transforms[i](el, code);
        }

        return code;
      }
    } // hoist static sub-trees out


    function genStatic(el, state) {
      el.staticProcessed = true; // Some elements (templates) need to behave differently inside of a v-pre
      // node.  All pre nodes are static roots, so we can use this as a location to
      // wrap a state change and reset it upon exiting the pre node.

      var originalPreState = state.pre;

      if (el.pre) {
        state.pre = el.pre;
      }

      state.staticRenderFns.push("with(this){return " + genElement(el, state) + "}");
      state.pre = originalPreState;
      return "_m(" + (state.staticRenderFns.length - 1) + (el.staticInFor ? ',true' : '') + ")";
    } // v-once


    function genOnce(el, state) {
      el.onceProcessed = true;

      if (el.if && !el.ifProcessed) {
        return genIf(el, state);
      } else if (el.staticInFor) {
        var key = '';
        var parent = el.parent;

        while (parent) {
          if (parent.for) {
            key = parent.key;
            break;
          }

          parent = parent.parent;
        }

        if (!key) {
          state.warn("v-once can only be used inside v-for that is keyed. ", el.rawAttrsMap['v-once']);
          return genElement(el, state);
        }

        return "_o(" + genElement(el, state) + "," + state.onceId++ + "," + key + ")";
      } else {
        return genStatic(el, state);
      }
    }

    function genIf(el, state, altGen, altEmpty) {
      el.ifProcessed = true; // avoid recursion

      return genIfConditions(el.ifConditions.slice(), state, altGen, altEmpty);
    }

    function genIfConditions(conditions, state, altGen, altEmpty) {
      if (!conditions.length) {
        return altEmpty || '_e()';
      }

      var condition = conditions.shift();

      if (condition.exp) {
        return "(" + condition.exp + ")?" + genTernaryExp(condition.block) + ":" + genIfConditions(conditions, state, altGen, altEmpty);
      } else {
        return "" + genTernaryExp(condition.block);
      } // v-if with v-once should generate code like (a)?_m(0):_m(1)


      function genTernaryExp(el) {
        return altGen ? altGen(el, state) : el.once ? genOnce(el, state) : genElement(el, state);
      }
    }

    function genFor(el, state, altGen, altHelper) {
      var exp = el.for;
      var alias = el.alias;
      var iterator1 = el.iterator1 ? "," + el.iterator1 : '';
      var iterator2 = el.iterator2 ? "," + el.iterator2 : '';

      if (state.maybeComponent(el) && el.tag !== 'slot' && el.tag !== 'template' && !el.key) {
        state.warn("<" + el.tag + " v-for=\"" + alias + " in " + exp + "\">: component lists rendered with " + "v-for should have explicit keys. " + "See https://vuejs.org/guide/list.html#key for more info.", el.rawAttrsMap['v-for'], true
        /* tip */
        );
      }

      el.forProcessed = true; // avoid recursion

      return (altHelper || '_l') + "((" + exp + ")," + "function(" + alias + iterator1 + iterator2 + "){" + "return " + (altGen || genElement)(el, state) + '})';
    }

    function genData$2(el, state) {
      var data = '{'; // directives first.
      // directives may mutate the el's other properties before they are generated.

      var dirs = genDirectives(el, state);

      if (dirs) {
        data += dirs + ',';
      } // key


      if (el.key) {
        data += "key:" + el.key + ",";
      } // ref


      if (el.ref) {
        data += "ref:" + el.ref + ",";
      }

      if (el.refInFor) {
        data += "refInFor:true,";
      } // pre


      if (el.pre) {
        data += "pre:true,";
      } // record original tag name for components using "is" attribute


      if (el.component) {
        data += "tag:\"" + el.tag + "\",";
      } // module data generation functions


      for (var i = 0; i < state.dataGenFns.length; i++) {
        data += state.dataGenFns[i](el);
      } // attributes


      if (el.attrs) {
        data += "attrs:" + genProps(el.attrs) + ",";
      } // DOM props


      if (el.props) {
        data += "domProps:" + genProps(el.props) + ",";
      } // event handlers


      if (el.events) {
        data += genHandlers(el.events, false) + ",";
      }

      if (el.nativeEvents) {
        data += genHandlers(el.nativeEvents, true) + ",";
      } // slot target
      // only for non-scoped slots


      if (el.slotTarget && !el.slotScope) {
        data += "slot:" + el.slotTarget + ",";
      } // scoped slots


      if (el.scopedSlots) {
        data += genScopedSlots(el, el.scopedSlots, state) + ",";
      } // component v-model


      if (el.model) {
        data += "model:{value:" + el.model.value + ",callback:" + el.model.callback + ",expression:" + el.model.expression + "},";
      } // inline-template


      if (el.inlineTemplate) {
        var inlineTemplate = genInlineTemplate(el, state);

        if (inlineTemplate) {
          data += inlineTemplate + ",";
        }
      }

      data = data.replace(/,$/, '') + '}'; // v-bind dynamic argument wrap
      // v-bind with dynamic arguments must be applied using the same v-bind object
      // merge helper so that class/style/mustUseProp attrs are handled correctly.

      if (el.dynamicAttrs) {
        data = "_b(" + data + ",\"" + el.tag + "\"," + genProps(el.dynamicAttrs) + ")";
      } // v-bind data wrap


      if (el.wrapData) {
        data = el.wrapData(data);
      } // v-on data wrap


      if (el.wrapListeners) {
        data = el.wrapListeners(data);
      }

      return data;
    }

    function genDirectives(el, state) {
      var dirs = el.directives;

      if (!dirs) {
        return;
      }

      var res = 'directives:[';
      var hasRuntime = false;
      var i, l, dir, needRuntime;

      for (i = 0, l = dirs.length; i < l; i++) {
        dir = dirs[i];
        needRuntime = true;
        var gen = state.directives[dir.name];

        if (gen) {
          // compile-time directive that manipulates AST.
          // returns true if it also needs a runtime counterpart.
          needRuntime = !!gen(el, dir, state.warn);
        }

        if (needRuntime) {
          hasRuntime = true;
          res += "{name:\"" + dir.name + "\",rawName:\"" + dir.rawName + "\"" + (dir.value ? ",value:(" + dir.value + "),expression:" + JSON.stringify(dir.value) : '') + (dir.arg ? ",arg:" + (dir.isDynamicArg ? dir.arg : "\"" + dir.arg + "\"") : '') + (dir.modifiers ? ",modifiers:" + JSON.stringify(dir.modifiers) : '') + "},";
        }
      }

      if (hasRuntime) {
        return res.slice(0, -1) + ']';
      }
    }

    function genInlineTemplate(el, state) {
      var ast = el.children[0];

      if (el.children.length !== 1 || ast.type !== 1) {
        state.warn('Inline-template components must have exactly one child element.', {
          start: el.start
        });
      }

      if (ast && ast.type === 1) {
        var inlineRenderFns = generate(ast, state.options);
        return "inlineTemplate:{render:function(){" + inlineRenderFns.render + "},staticRenderFns:[" + inlineRenderFns.staticRenderFns.map(function (code) {
          return "function(){" + code + "}";
        }).join(',') + "]}";
      }
    }

    function genScopedSlots(el, slots, state) {
      // by default scoped slots are considered "stable", this allows child
      // components with only scoped slots to skip forced updates from parent.
      // but in some cases we have to bail-out of this optimization
      // for example if the slot contains dynamic names, has v-if or v-for on them...
      var needsForceUpdate = el.for || Object.keys(slots).some(function (key) {
        var slot = slots[key];
        return slot.slotTargetDynamic || slot.if || slot.for || containsSlotChild(slot) // is passing down slot from parent which may be dynamic
        ;
      }); // #9534: if a component with scoped slots is inside a conditional branch,
      // it's possible for the same component to be reused but with different
      // compiled slot content. To avoid that, we generate a unique key based on
      // the generated code of all the slot contents.

      var needsKey = !!el.if; // OR when it is inside another scoped slot or v-for (the reactivity may be
      // disconnected due to the intermediate scope variable)
      // #9438, #9506
      // TODO: this can be further optimized by properly analyzing in-scope bindings
      // and skip force updating ones that do not actually use scope variables.

      if (!needsForceUpdate) {
        var parent = el.parent;

        while (parent) {
          if (parent.slotScope && parent.slotScope !== emptySlotScopeToken || parent.for) {
            needsForceUpdate = true;
            break;
          }

          if (parent.if) {
            needsKey = true;
          }

          parent = parent.parent;
        }
      }

      var generatedSlots = Object.keys(slots).map(function (key) {
        return genScopedSlot(slots[key], state);
      }).join(',');
      return "scopedSlots:_u([" + generatedSlots + "]" + (needsForceUpdate ? ",null,true" : "") + (!needsForceUpdate && needsKey ? ",null,false," + hash(generatedSlots) : "") + ")";
    }

    function hash(str) {
      var hash = 5381;
      var i = str.length;

      while (i) {
        hash = hash * 33 ^ str.charCodeAt(--i);
      }

      return hash >>> 0;
    }

    function containsSlotChild(el) {
      if (el.type === 1) {
        if (el.tag === 'slot') {
          return true;
        }

        return el.children.some(containsSlotChild);
      }

      return false;
    }

    function genScopedSlot(el, state) {
      var isLegacySyntax = el.attrsMap['slot-scope'];

      if (el.if && !el.ifProcessed && !isLegacySyntax) {
        return genIf(el, state, genScopedSlot, "null");
      }

      if (el.for && !el.forProcessed) {
        return genFor(el, state, genScopedSlot);
      }

      var slotScope = el.slotScope === emptySlotScopeToken ? "" : String(el.slotScope);
      var fn = "function(" + slotScope + "){" + "return " + (el.tag === 'template' ? el.if && isLegacySyntax ? "(" + el.if + ")?" + (genChildren(el, state) || 'undefined') + ":undefined" : genChildren(el, state) || 'undefined' : genElement(el, state)) + "}"; // reverse proxy v-slot without scope on this.$slots

      var reverseProxy = slotScope ? "" : ",proxy:true";
      return "{key:" + (el.slotTarget || "\"default\"") + ",fn:" + fn + reverseProxy + "}";
    }

    function genChildren(el, state, checkSkip, altGenElement, altGenNode) {
      var children = el.children;

      if (children.length) {
        var el$1 = children[0]; // optimize single v-for

        if (children.length === 1 && el$1.for && el$1.tag !== 'template' && el$1.tag !== 'slot') {
          var normalizationType = checkSkip ? state.maybeComponent(el$1) ? ",1" : ",0" : "";
          return "" + (altGenElement || genElement)(el$1, state) + normalizationType;
        }

        var normalizationType$1 = checkSkip ? getNormalizationType(children, state.maybeComponent) : 0;
        var gen = altGenNode || genNode;
        return "[" + children.map(function (c) {
          return gen(c, state);
        }).join(',') + "]" + (normalizationType$1 ? "," + normalizationType$1 : '');
      }
    } // determine the normalization needed for the children array.
    // 0: no normalization needed
    // 1: simple normalization needed (possible 1-level deep nested array)
    // 2: full normalization needed


    function getNormalizationType(children, maybeComponent) {
      var res = 0;

      for (var i = 0; i < children.length; i++) {
        var el = children[i];

        if (el.type !== 1) {
          continue;
        }

        if (needsNormalization(el) || el.ifConditions && el.ifConditions.some(function (c) {
          return needsNormalization(c.block);
        })) {
          res = 2;
          break;
        }

        if (maybeComponent(el) || el.ifConditions && el.ifConditions.some(function (c) {
          return maybeComponent(c.block);
        })) {
          res = 1;
        }
      }

      return res;
    }

    function needsNormalization(el) {
      return el.for !== undefined || el.tag === 'template' || el.tag === 'slot';
    }

    function genNode(node, state) {
      if (node.type === 1) {
        return genElement(node, state);
      } else if (node.type === 3 && node.isComment) {
        return genComment(node);
      } else {
        return genText(node);
      }
    }

    function genText(text) {
      return "_v(" + (text.type === 2 ? text.expression // no need for () because already wrapped in _s()
      : transformSpecialNewlines(JSON.stringify(text.text))) + ")";
    }

    function genComment(comment) {
      return "_e(" + JSON.stringify(comment.text) + ")";
    }

    function genSlot(el, state) {
      var slotName = el.slotName || '"default"';
      var children = genChildren(el, state);
      var res = "_t(" + slotName + (children ? "," + children : '');
      var attrs = el.attrs || el.dynamicAttrs ? genProps((el.attrs || []).concat(el.dynamicAttrs || []).map(function (attr) {
        return {
          // slot props are camelized
          name: camelize(attr.name),
          value: attr.value,
          dynamic: attr.dynamic
        };
      })) : null;
      var bind$$1 = el.attrsMap['v-bind'];

      if ((attrs || bind$$1) && !children) {
        res += ",null";
      }

      if (attrs) {
        res += "," + attrs;
      }

      if (bind$$1) {
        res += (attrs ? '' : ',null') + "," + bind$$1;
      }

      return res + ')';
    } // componentName is el.component, take it as argument to shun flow's pessimistic refinement


    function genComponent(componentName, el, state) {
      var children = el.inlineTemplate ? null : genChildren(el, state, true);
      return "_c(" + componentName + "," + genData$2(el, state) + (children ? "," + children : '') + ")";
    }

    function genProps(props) {
      var staticProps = "";
      var dynamicProps = "";

      for (var i = 0; i < props.length; i++) {
        var prop = props[i];
        var value = transformSpecialNewlines(prop.value);

        if (prop.dynamic) {
          dynamicProps += prop.name + "," + value + ",";
        } else {
          staticProps += "\"" + prop.name + "\":" + value + ",";
        }
      }

      staticProps = "{" + staticProps.slice(0, -1) + "}";

      if (dynamicProps) {
        return "_d(" + staticProps + ",[" + dynamicProps.slice(0, -1) + "])";
      } else {
        return staticProps;
      }
    } // #3895, #4268


    function transformSpecialNewlines(text) {
      return text.replace(/\u2028/g, "\\u2028").replace(/\u2029/g, "\\u2029");
    }
    /*  */
    // these keywords should not appear inside expressions, but operators like
    // typeof, instanceof and in are allowed


    var prohibitedKeywordRE = new RegExp('\\b' + ('do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' + 'super,throw,while,yield,delete,export,import,return,switch,default,' + 'extends,finally,continue,debugger,function,arguments').split(',').join('\\b|\\b') + '\\b'); // these unary operators should not be used as property/method names

    var unaryOperatorsRE = new RegExp('\\b' + 'delete,typeof,void'.split(',').join('\\s*\\([^\\)]*\\)|\\b') + '\\s*\\([^\\)]*\\)'); // strip strings in expressions

    var stripStringRE = /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g; // detect problematic expressions in a template

    function detectErrors(ast, warn) {
      if (ast) {
        checkNode(ast, warn);
      }
    }

    function checkNode(node, warn) {
      if (node.type === 1) {
        for (var name in node.attrsMap) {
          if (dirRE.test(name)) {
            var value = node.attrsMap[name];

            if (value) {
              var range = node.rawAttrsMap[name];

              if (name === 'v-for') {
                checkFor(node, "v-for=\"" + value + "\"", warn, range);
              } else if (name === 'v-slot' || name[0] === '#') {
                checkFunctionParameterExpression(value, name + "=\"" + value + "\"", warn, range);
              } else if (onRE.test(name)) {
                checkEvent(value, name + "=\"" + value + "\"", warn, range);
              } else {
                checkExpression(value, name + "=\"" + value + "\"", warn, range);
              }
            }
          }
        }

        if (node.children) {
          for (var i = 0; i < node.children.length; i++) {
            checkNode(node.children[i], warn);
          }
        }
      } else if (node.type === 2) {
        checkExpression(node.expression, node.text, warn, node);
      }
    }

    function checkEvent(exp, text, warn, range) {
      var stripped = exp.replace(stripStringRE, '');
      var keywordMatch = stripped.match(unaryOperatorsRE);

      if (keywordMatch && stripped.charAt(keywordMatch.index - 1) !== '$') {
        warn("avoid using JavaScript unary operator as property name: " + "\"" + keywordMatch[0] + "\" in expression " + text.trim(), range);
      }

      checkExpression(exp, text, warn, range);
    }

    function checkFor(node, text, warn, range) {
      checkExpression(node.for || '', text, warn, range);
      checkIdentifier(node.alias, 'v-for alias', text, warn, range);
      checkIdentifier(node.iterator1, 'v-for iterator', text, warn, range);
      checkIdentifier(node.iterator2, 'v-for iterator', text, warn, range);
    }

    function checkIdentifier(ident, type, text, warn, range) {
      if (typeof ident === 'string') {
        try {
          new Function("var " + ident + "=_");
        } catch (e) {
          warn("invalid " + type + " \"" + ident + "\" in expression: " + text.trim(), range);
        }
      }
    }

    function checkExpression(exp, text, warn, range) {
      try {
        new Function("return " + exp);
      } catch (e) {
        var keywordMatch = exp.replace(stripStringRE, '').match(prohibitedKeywordRE);

        if (keywordMatch) {
          warn("avoid using JavaScript keyword as property name: " + "\"" + keywordMatch[0] + "\"\n  Raw expression: " + text.trim(), range);
        } else {
          warn("invalid expression: " + e.message + " in\n\n" + "    " + exp + "\n\n" + "  Raw expression: " + text.trim() + "\n", range);
        }
      }
    }

    function checkFunctionParameterExpression(exp, text, warn, range) {
      try {
        new Function(exp, '');
      } catch (e) {
        warn("invalid function parameter expression: " + e.message + " in\n\n" + "    " + exp + "\n\n" + "  Raw expression: " + text.trim() + "\n", range);
      }
    }
    /*  */


    var range = 2;

    function generateCodeFrame(source, start, end) {
      if (start === void 0) start = 0;
      if (end === void 0) end = source.length;
      var lines = source.split(/\r?\n/);
      var count = 0;
      var res = [];

      for (var i = 0; i < lines.length; i++) {
        count += lines[i].length + 1;

        if (count >= start) {
          for (var j = i - range; j <= i + range || end > count; j++) {
            if (j < 0 || j >= lines.length) {
              continue;
            }

            res.push("" + (j + 1) + repeat$1(" ", 3 - String(j + 1).length) + "|  " + lines[j]);
            var lineLength = lines[j].length;

            if (j === i) {
              // push underline
              var pad = start - (count - lineLength) + 1;
              var length = end > count ? lineLength - pad : end - start;
              res.push("   |  " + repeat$1(" ", pad) + repeat$1("^", length));
            } else if (j > i) {
              if (end > count) {
                var length$1 = Math.min(end - count, lineLength);
                res.push("   |  " + repeat$1("^", length$1));
              }

              count += lineLength + 1;
            }
          }

          break;
        }
      }

      return res.join('\n');
    }

    function repeat$1(str, n) {
      var result = '';

      if (n > 0) {
        while (true) {
          // eslint-disable-line
          if (n & 1) {
            result += str;
          }

          n >>>= 1;

          if (n <= 0) {
            break;
          }

          str += str;
        }
      }

      return result;
    }
    /*  */


    function createFunction(code, errors) {
      try {
        return new Function(code);
      } catch (err) {
        errors.push({
          err: err,
          code: code
        });
        return noop;
      }
    }

    function createCompileToFunctionFn(compile) {
      var cache = Object.create(null);
      return function compileToFunctions(template, options, vm) {
        options = extend({}, options);
        var warn$$1 = options.warn || warn;
        delete options.warn;
        /* istanbul ignore if */

        {
          // detect possible CSP restriction
          try {
            new Function('return 1');
          } catch (e) {
            if (e.toString().match(/unsafe-eval|CSP/)) {
              warn$$1('It seems you are using the standalone build of Vue.js in an ' + 'environment with Content Security Policy that prohibits unsafe-eval. ' + 'The template compiler cannot work in this environment. Consider ' + 'relaxing the policy to allow unsafe-eval or pre-compiling your ' + 'templates into render functions.');
            }
          }
        } // check cache

        var key = options.delimiters ? String(options.delimiters) + template : template;

        if (cache[key]) {
          return cache[key];
        } // compile


        var compiled = compile(template, options); // check compilation errors/tips

        {
          if (compiled.errors && compiled.errors.length) {
            if (options.outputSourceRange) {
              compiled.errors.forEach(function (e) {
                warn$$1("Error compiling template:\n\n" + e.msg + "\n\n" + generateCodeFrame(template, e.start, e.end), vm);
              });
            } else {
              warn$$1("Error compiling template:\n\n" + template + "\n\n" + compiled.errors.map(function (e) {
                return "- " + e;
              }).join('\n') + '\n', vm);
            }
          }

          if (compiled.tips && compiled.tips.length) {
            if (options.outputSourceRange) {
              compiled.tips.forEach(function (e) {
                return tip(e.msg, vm);
              });
            } else {
              compiled.tips.forEach(function (msg) {
                return tip(msg, vm);
              });
            }
          }
        } // turn code into functions

        var res = {};
        var fnGenErrors = [];
        res.render = createFunction(compiled.render, fnGenErrors);
        res.staticRenderFns = compiled.staticRenderFns.map(function (code) {
          return createFunction(code, fnGenErrors);
        }); // check function generation errors.
        // this should only happen if there is a bug in the compiler itself.
        // mostly for codegen development use

        /* istanbul ignore if */

        {
          if ((!compiled.errors || !compiled.errors.length) && fnGenErrors.length) {
            warn$$1("Failed to generate render function:\n\n" + fnGenErrors.map(function (ref) {
              var err = ref.err;
              var code = ref.code;
              return err.toString() + " in\n\n" + code + "\n";
            }).join('\n'), vm);
          }
        }
        return cache[key] = res;
      };
    }
    /*  */


    function createCompilerCreator(baseCompile) {
      return function createCompiler(baseOptions) {
        function compile(template, options) {
          var finalOptions = Object.create(baseOptions);
          var errors = [];
          var tips = [];

          var warn = function warn(msg, range, tip) {
            (tip ? tips : errors).push(msg);
          };

          if (options) {
            if (options.outputSourceRange) {
              // $flow-disable-line
              var leadingSpaceLength = template.match(/^\s*/)[0].length;

              warn = function warn(msg, range, tip) {
                var data = {
                  msg: msg
                };

                if (range) {
                  if (range.start != null) {
                    data.start = range.start + leadingSpaceLength;
                  }

                  if (range.end != null) {
                    data.end = range.end + leadingSpaceLength;
                  }
                }

                (tip ? tips : errors).push(data);
              };
            } // merge custom modules


            if (options.modules) {
              finalOptions.modules = (baseOptions.modules || []).concat(options.modules);
            } // merge custom directives


            if (options.directives) {
              finalOptions.directives = extend(Object.create(baseOptions.directives || null), options.directives);
            } // copy other options


            for (var key in options) {
              if (key !== 'modules' && key !== 'directives') {
                finalOptions[key] = options[key];
              }
            }
          }

          finalOptions.warn = warn;
          var compiled = baseCompile(template.trim(), finalOptions);
          {
            detectErrors(compiled.ast, warn);
          }
          compiled.errors = errors;
          compiled.tips = tips;
          return compiled;
        }

        return {
          compile: compile,
          compileToFunctions: createCompileToFunctionFn(compile)
        };
      };
    }
    /*  */
    // `createCompilerCreator` allows creating compilers that use alternative
    // parser/optimizer/codegen, e.g the SSR optimizing compiler.
    // Here we just export a default compiler using the default parts.


    var createCompiler = createCompilerCreator(function baseCompile(template, options) {
      var ast = parse(template.trim(), options);

      if (options.optimize !== false) {
        optimize(ast, options);
      }

      var code = generate(ast, options);
      return {
        ast: ast,
        render: code.render,
        staticRenderFns: code.staticRenderFns
      };
    });
    /*  */

    var ref$1 = createCompiler(baseOptions);
    var compileToFunctions = ref$1.compileToFunctions;
    /*  */
    // check whether current browser encodes a char inside attribute values

    var div;

    function getShouldDecode(href) {
      div = div || document.createElement('div');
      div.innerHTML = href ? "<a href=\"\n\"/>" : "<div a=\"\n\"/>";
      return div.innerHTML.indexOf('&#10;') > 0;
    } // #3663: IE encodes newlines inside attribute values while other browsers don't


    var shouldDecodeNewlines = inBrowser ? getShouldDecode(false) : false; // #6828: chrome encodes content in a[href]

    var shouldDecodeNewlinesForHref = inBrowser ? getShouldDecode(true) : false;
    /*  */

    var idToTemplate = cached(function (id) {
      var el = query(id);
      return el && el.innerHTML;
    });
    var mount = Vue.prototype.$mount;

    Vue.prototype.$mount = function (el, hydrating) {
      el = el && query(el);
      /* istanbul ignore if */

      if (el === document.body || el === document.documentElement) {
        warn("Do not mount Vue to <html> or <body> - mount to normal elements instead.");
        return this;
      }

      var options = this.$options; // resolve template/el and convert to render function

      if (!options.render) {
        var template = options.template;

        if (template) {
          if (typeof template === 'string') {
            if (template.charAt(0) === '#') {
              template = idToTemplate(template);
              /* istanbul ignore if */

              if (!template) {
                warn("Template element not found or is empty: " + options.template, this);
              }
            }
          } else if (template.nodeType) {
            template = template.innerHTML;
          } else {
            {
              warn('invalid template option:' + template, this);
            }
            return this;
          }
        } else if (el) {
          template = getOuterHTML(el);
        }

        if (template) {
          /* istanbul ignore if */
          if (config.performance && mark) {
            mark('compile');
          }

          var ref = compileToFunctions(template, {
            outputSourceRange: "development" !== 'production',
            shouldDecodeNewlines: shouldDecodeNewlines,
            shouldDecodeNewlinesForHref: shouldDecodeNewlinesForHref,
            delimiters: options.delimiters,
            comments: options.comments
          }, this);
          var render = ref.render;
          var staticRenderFns = ref.staticRenderFns;
          options.render = render;
          options.staticRenderFns = staticRenderFns;
          /* istanbul ignore if */

          if (config.performance && mark) {
            mark('compile end');
            measure("vue " + this._name + " compile", 'compile', 'compile end');
          }
        }
      }

      return mount.call(this, el, hydrating);
    };
    /**
     * Get outerHTML of elements, taking care
     * of SVG elements in IE as well.
     */


    function getOuterHTML(el) {
      if (el.outerHTML) {
        return el.outerHTML;
      } else {
        var container = document.createElement('div');
        container.appendChild(el.cloneNode(true));
        return container.innerHTML;
      }
    }

    Vue.compile = compileToFunctions;
    exports.VueVendorV2 = Vue;
  }

}((this.BX = this.BX || {})));
//# sourceMappingURL=dev.vue.bundle.js.map
